The G100 is La Joux-Perret’s automatic three-hand date movement, listed with a 68-hour power reserve and dimensional compatibility with ETA 2824 and Sellita SW200 case formats. The L100 is a separate automatic tri-compax chronograph, listed with a 60-hour reserve and dimensional compatibility with ETA 7750 and Sellita SW500A formats. These compatibility references do not guarantee that parts will interchange or that either movement will fit a particular watch without further checks.
G100 and L100 at a glance
| Specification | La Joux-Perret G100 | La Joux-Perret L100 |
|---|---|---|
| Watch category | Automatic hours-minutes-seconds with date | Automatic tri-compax chronograph with day-date |
| Movement dimensions | Ø25.6 × 4.45 mm | Ø30.00 × 7.90 mm |
| Casing diameter | 26.00 mm | 30.40 mm |
| Dimensional compatibility references | ETA 2824 and Sellita SW200 | ETA 7750 and Sellita SW500A |
| Frequency | 4 Hz | 4 Hz |
| Power reserve | 68 hours | 60 hours |
| Jewels | 24 | 26 automatic; 24 manual |
| Other listed functions | Hacking seconds, unidirectional automatic winding | Hacking seconds, 30-minute and 12-hour counters, small seconds, day-date |
These are manufacturer-listed movement specifications, not guarantees of a particular watch’s accuracy, fit, or serviceability. La Joux-Perret lists the G100 technical specifications and L100 technical specifications on its product pages.
What is the La Joux-Perret G100?
The G100 is an automatic hours-minutes-seconds movement with a date. La Joux-Perret lists its dimensions as 25.6 mm in diameter by 4.45 mm thick, with a 26.00 mm casing diameter. It runs at 4 Hz, has hacking seconds and 24 jewels, winds automatically in one direction, and has a listed 68-hour power reserve.
The reserve is a published specification, not a measure of accuracy or durability. Actual performance and user experience depend on the complete watch and its configuration.
Do these 3 things before closing this tab:
1Fix the driver behind crashes, sound loss and screen glitches2Repair Windows errors before they cause bigger problems3Scan for outdated or missing drivers - takes under a minute#1 Best Overall
- Shock-resistant and durable: The watch is made of high-quality materials and has a strong shock-resistant structure, making it suitable for various outdoor sports and daily wear.
- Multiple functions: The watch has multiple functions such as stopwatch, calendar, backlight, alarm clock, etc., making it more convenient for your daily life.
- Easy to read: The watch has a clear digital display, and the numbers are large and easy to read, even in dark environments.
- Comfortable to wear: The watch has a soft and comfortable silicone strap, which fits comfortably on your wrist and is not easy to fall off.
- Water resistant: The watch has a water resistance of up to 50 meters, in general, suitable for swimming and snorkeling, but not diving.
Why the G100 is associated with ETA 2824 and SW200 watches
La Joux-Perret lists the ETA 2824 and Sellita SW200 as dimensional compatibility references for the G100. This makes it relevant to brands and watchmakers working with that familiar case format, but it does not establish universal drop-in fit or interchangeable parts. The Federation of the Swiss Watch Industry likewise described the G100 as targeting the common 2824 case format in its 2021 report.
Dimensional compatibility should not be confused with mechanical identity. The evidence cited here does not establish that the G100 is an ETA clone or a Miyota 9015 clone.
Is the G100 accurate?
The specifications in the research do not establish one universal accuracy guarantee for every G100 or G100-powered watch. Accuracy claims should be checked against the particular watchmaker’s stated regulation or testing standard rather than inferred from the movement name, frequency, or reserve.
G100 and Miyota 9015 specifications
A comparison of published figures can help with case planning, but it does not prove differences in accuracy, reliability, servicing cost, or design origin.
Quick wins for a faster PC:
Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →Clear out junk files and repair common Windows errorsFree Scan →Scan for outdated or missing drivers - takes under a minuteDriver Scan →| Specification | La Joux-Perret G100 | Miyota 9015 |
|---|---|---|
| Thickness | 4.45 mm | 3.90 mm |
| Published power reserve | 68 hours | Approximately 42 hours |
| Frequency | 4 Hz | 4 Hz |
| Jewels | 24 | 24 |
The Miyota figures are from its official 9015 product page; G100 figures are from La Joux-Perret’s technical page.
What is the La Joux-Perret L100?
The L100 is an automatic tri-compax chronograph, not a G100 with additional functions. La Joux-Perret lists a 30-minute counter, 12-hour counter, small seconds, and day-date. Its dimensions are 30.00 mm in diameter by 7.90 mm thick, with a 30.40 mm casing diameter. It runs at 4 Hz, has hacking seconds and a 60-hour reserve, and is listed with 26 jewels in automatic form or 24 in manual form.
La Joux-Perret names the ETA 7750 and Sellita SW500A as dimensional compatibility references. The L100 therefore belongs to a larger chronograph format with its own fit requirements.
Rank #2
![Apple Watch Series 11 [GPS 42mm] Smartwatch with Rose Gold Aluminum Case with Light Blush Sport Band - S/M. Sleep Score, Fitness Tracker, Health Monitoring, Always-On Display, Water Resistant](https://m.media-amazon.com/images/I/31caPPnRysL._SL160_.jpg)
- A FULL-FEATURED HEALTH TRACKER—Apple Watch Series 11 gives you invaluable insights about your body, right from your wrist. Take an ECG anytime* and get alerts for a high and low heart rate or an irregular rhythm*—so you can stay closer to your heart. You can also view your overnight health tracking metrics with the Vitals app* and be notified of possible sleep apnea.*
- KNOW YOUR SLEEP SCORE—With advanced sleep tracking, Series 11 gives you a daily sleep score. It’s an easy way to help measure and understand the quality of your sleep, so you can make it more restorative.
- GET HYPERTENSION NOTIFICATIONS—Did you know that Series 11 can spot signs of chronic high blood pressure? By analyzing how your blood vessels respond to beats of the heart, it can notify you of possible hypertension.*
- SAFETY FEATURES—A smartwatch that puts your safety first. Series 11 can detect a hard fall or severe car crash, automatically help connect you with emergency services, and notify your emergency contacts.* Check In can automatically notify a loved one when you’ve arrived at your destination.
- A POWERFUL FITNESS TRACKER—With advanced metrics and motivating features like Pacer, Heart Rate Zones, training load, and Workout Buddy powered by Apple Intelligence from your nearby iPhone*—Series 11 is made to help everyone stay active, from runners and hikers to strength-training enthusiasts.
Integrated chronograph and column wheel
The research identifies the L100 as an automatic tri-compax chronograph, but does not establish a comparative performance verdict against other chronographs. A movement’s architecture alone does not prove that a particular watch is more accurate, durable, easier to service, or better to operate.
Check the exact L100 configuration
Confirm the precise movement reference and watch specification before relying on a general L100 description. The manufacturer’s listed functions and dimensions are the appropriate starting point; do not assume that every L-series derivative or brand-specific calibre designation has identical specifications.
G100 versus L100: they are not direct substitutes
The G100 is a compact automatic time-and-date movement, while the L100 is a larger automatic chronograph. They serve different watch categories and are not alternatives for the same case and dial.
- G100: Consider it when researching a three-hand date watch in the ETA 2824/SW200 dimensional category.
- L100: Consider it when researching an automatic chronograph in the ETA 7750/SW500A dimensional category.
- Reserve: The published figures are 68 hours for the G100 and 60 hours for the L100, but reserve alone does not establish overall quality or value.
What does “compatible with ETA” actually mean?
La Joux-Perret’s compatibility fields identify dimensional references: G100 with ETA 2824 and SW200, and L100 with ETA 7750 and SW500A. That is useful information for case planning, but it is not proof that every component transfers directly or that a movement will fit a specific watch without modification.
Before a conversion or replacement, verify the exact watch and movement for:
The Tool Desk
Outbyte Driver Updater FREEScan for outdated or missing drivers - takes under a minuteDriver Scan →Outbyte PC Repair FREERepair Windows errors before they cause bigger problemsFix Now →- hands and hand heights;
- dial feet and clearance;
- date or day-date arrangement and date-wheel alignment;
- movement holders and retaining rings;
- stem position and crown geometry;
- caseback, rotor, and crystal clearance;
- chronograph counter layout and pusher positions; and
- availability of movement-specific service parts.
Movement-swap checklist
If you are considering replacing an ETA or Sellita movement, have the exact installation checked by a qualified watchmaker or the watch’s manufacturer. Use this checklist:
- Identify the reference: Confirm the exact movement and variant, not just its family name.
- Check the hands: Verify hand-hole dimensions and hand heights for the relevant displays.
- Check the calendar: Confirm date versus day-date, wheel position, and alignment with the dial opening.
- Check the dial and holder: Verify dial-foot locations, retaining arrangements, and clearance.
- Check the stem and case: Confirm stem position and length, crown geometry, movement height, and case clearances.
- For chronographs, check the layout: Verify counter positions, pusher locations, and case requirements.
- Confirm service support: Establish whether the necessary parts and technical expertise are available.
Manufacturer-listed dimensional compatibility is a starting point, not a conversion guide or permission for an unsupervised movement swap.
Rank #3
- 【DIGITAL MULTIFUNCTION WATCHES】 ⌚:Appeals to mens, especially to those who like doing sports, shock resistant, stop watch, and LED back light functions make it perfect for all kind of sport and daily use
- 【3ATM WATERPROOF WATCHES FOR MEN】⌚:Mens wrist watches is waterproof 30M/3ATM, suitable for sweat-proof, rain-proof and hand-wash. BUT NOT for bathing, swimming, diving, or immersion in water. Please avoid hot water and steam. Note: Keep your hands dry before pressing the button; do not press underwater.Fashion and casual style, suitable for most indoor or outdoor activities.
- 【Mens Analog Watch】⌚ Mens watch made with anti-scratch mineral dial window, exquisitely crafted. Ultra soft silicone strap, wear-resistant and scratch-resistant, breathable, easy to maintain. Men's wrist watch is an ideal present for you and your loved ones.
- 【Mens Digital Watch】⌚ Simple and easy-to-operate functions, with Waterproof, 12/24 hours switch, alarm clock, hourly alarm and daily alarm, Auto Date, Stop Watch, LED Light
- 【Purchase without Worry】⌚ This stylish and simple sport work watches surprising woemen watch casual watch is very suitable for active lifestyles, will suitable for personal use and good for anniversary, graduation, business, birthday, Christmas, for father, boyfriend, or other male friend, classmates.
Why the G100 and L100 matter to the watch industry
The G100 and L100 are positioned in familiar case-format categories associated with widely used ETA and Sellita movements. The Federation of the Swiss Watch Industry reported in 2021 that the G100 and L100 offered longer reserves than the established formats it discussed: 68 hours for the G100 and 60 hours for the L100. It also reported that modernization and industrialization reduced development costs by approximately 25%; that is a dated report about development costs, not a current retail-price claim.
La Joux-Perret’s news archive marked production of 50,000 G100 movements in May 2023. This is a historical cumulative milestone, not an annual production figure.
Quick wins for a faster PC:
Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →Clear out junk files and repair common Windows errorsFree Scan →Scan for outdated or missing drivers - takes under a minuteDriver Scan →Swiss-made and manufacture claims
Describe the movement and the watch brand’s role precisely. A watch using a La Joux-Perret G100 can be described as G100-powered; a brand-specific designation should be checked against that brand’s documentation. The supplied research supports the listed technical specifications and compatibility references, not broader assumptions about who developed or produced every component in a particular watch.
Documented watch using the G100
ELKA Série ELKA X
ELKA’s Série ELKA X feature page identifies the La Joux-Perret G100 automatic caliber and lists a 4 Hz frequency, hacking seconds, and 68-hour power reserve. This is a documented example of a G100-powered watch range. Check the exact model’s current specification and availability before making a purchase decision.
For shopping research, “G100-powered watches” is a useful search phrase, but verify the movement and watch reference with the manufacturer. Standalone movement availability and retailer listings are not established by the supplied research.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What buyers should evaluate beyond the calibre
A movement name is useful information, but it does not replace evaluation of the complete watch. Before buying a G100 or L100 watch, consider:
- Regulation: Look for the specific watch’s accuracy tolerance or test standard.
- Service support: Ask who can service the watch and whether movement-specific parts are supported.
- Case and wearability: Movement dimensions are not the same as the complete watch’s dimensions or comfort.
- Calendar and dial: Confirm the displayed functions match the exact model specification.
- Overall value: Compare the complete watch and its documented features rather than judging by the calibre name alone.
Common misconceptions
“The G100 is an ETA 2824 clone.”
The research supports a dimensional compatibility relationship with the ETA 2824 and SW200 formats, not a claim that the G100 is an ETA clone.
Rank #4
- ⌚ MENS WATCHES ANALOG: Mens military watches made with shock-resistant stainless steel case and anti-scratch mineral window, exquisitely crafted and durable. Men's watch strap width: 22mm / 0.86 inches, stainless steel case: 42mm / 1.65 inches.
- ⌚ MILITARY WATCHES FOR MEN: This mens field watch is very suitable for active lifestyles, with a comfortable double nylon strap, will suitable for personal use and good for anniversary, graduation, business, birthday , the father's day , Christmas .
- ⌚3 ATM WATERPROOF MILITARY WATCHES: 30M waterproof, sweat-proof, rain-proof and hand-washing for daily life, no problem. But NOT suitable for swimming, bathing, diving or touch hot water. Perfect for most of indoor / outdoor sports.
- ⌚ EASY TO READ TIME: 12 / 24 hrs military time and luminous dial. The mens watches equipped with date calendar can tell you the time quickly and accurately. Come with luminous function, easy to read the time even in the dark.
- ⌚ PURCHASE WITHOUT WORRY: Japan imported quartz analog movement and battery, long-term operation. for 1 years,24-hour customer service is at your service.
“The G100 is a Miyota 9015 clone.”
The available specifications support comparing selected published figures, such as thickness and reserve. They do not establish that the G100 is a Miyota 9015 clone or prove a design relationship.
“Compatible means I can swap every part.”
No. A dimensional compatibility listing does not establish universal part interchangeability. Hands, calendar parts, dial fit, stems, holders, clearances, and service parts must be checked for the exact watch.
FAQ
What is the difference between the G100 and L100?
The G100 is an automatic three-hand date movement with a listed 68-hour reserve. The L100 is a larger automatic tri-compax chronograph with a listed 60-hour reserve. They are designed for different watch categories.
What’s actually slowing this PC down?
Pick the symptom - the matching free tool is one click away.
Can an ETA 2824 or SW200 watch accept a G100?
La Joux-Perret lists the ETA 2824 and SW200 as dimensional compatibility references for the G100. That does not guarantee fit in a particular watch; a watchmaker should check the exact case, dial, hands, stem, holder, and clearances.
Can I use an ETA or Sellita date wheel on a G100?
The supplied research does not establish that an ETA 2824-2 or SW200-1 date wheel fits the G100. Treat the question as unresolved and confirm the precise part compatibility with La Joux-Perret or a qualified watchmaker.
Which watches use the G100?
ELKA’s Série ELKA X feature page identifies the G100 in its range. Confirm the exact model specification and current availability with the manufacturer.
Does the G100’s longer reserve mean it is more accurate?
No. A published 68-hour reserve is not an accuracy rating. Check the particular watch’s stated regulation or testing standard.
Bottom line
The G100 is a 25.6 × 4.45 mm automatic date movement listed with a 68-hour reserve; the L100 is a 30.00 × 7.90 mm automatic tri-compax chronograph listed with a 60-hour reserve. La Joux-Perret lists dimensional compatibility with familiar ETA and Sellita formats, but that does not guarantee universal drop-in fit or interchangeable parts. Check the exact watch configuration and service support before buying or considering a movement replacement.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
