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The Longines Conquest GMT is a legacy model, not the same watch as Longines’ current HydroConquest GMT. Search results identify older Conquest GMT references in the L3.687.4 family, including L3.687.4.56.6, but the available evidence does not establish a complete official specification sheet, current availability, or a reliable market price for those references. That makes exact-reference identification essential: modern HydroConquest GMT specifications cannot be used to fill gaps in a review of the older Conquest.
What watch does “Longines Conquest GMT” refer to?
The likely subject is the older Longines Conquest Automatic GMT, associated in search results with references in the L3.687.4 family. One result identifies L3.687.4.99.6, while a secondary review result refers to L3.687.4.56.6. These are useful identifiers, but they do not amount to an official Longines archive record or confirm that every reference has identical specifications.
| # | Preview | Product | Price | |
|---|---|---|---|---|
| 1 |
|
Conquest 41MM Quartz Watch | $900.00 | Buy on Amazon |
| 2 |
|
Conquest 41MM Automatic Watch | $2,400.00 | Buy on Amazon |
| 3 |
|
HYDROCONQUEST 41MM Automatic Watch | $1,600.00 | Buy on Amazon |
| 4 |
|
Cirtrar 22mm Rubber Silicone Watch Band Strap Compatible with Longines Conquest L3.835 L3.830 watch | $39.50 | Buy on Amazon |
Longines’ current official GMT collection is called HydroConquest GMT. The shared “Conquest” name does not make it a continuation of the older watch under the same reference. If buying or comparing one, match the reference number on the listing and watch documentation rather than relying on the title alone.
What can be verified about the older Conquest GMT?
The available evidence supports identifying L3.687.4.56.6 and L3.687.4.99.6 as legacy Conquest GMT references, but does not establish their exact case dimensions, movement, power reserve, water-resistance rating, bezel or crystal specifications, bracelet clasp details, or current manufacturer support status. It also does not establish a representative current price or whether new stock remains available.
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#1 Best Overall
- Stainless steel with triple safety folding clasp and push-piece opening mechanism
- 2 Year International Warranty
For a pre-owned example, ask the seller to confirm the exact reference and provide clear photographs of the dial, case back, clasp, and any included paperwork. Have the watch’s condition and authenticity assessed independently where practical; a reference match in a listing title alone does not verify that the individual watch is genuine or in good working order.
How the current HydroConquest GMT differs
Longines’ US product page describes the current HydroConquest GMT reference L3.790.4.56.6 as a 41 mm automatic stainless-steel watch with a ceramic bezel, GMT/date function, and up to 72 hours of power reserve. It lists a screw-in crown, unidirectional rotating bezel, sapphire crystal with anti-reflective coating, and water resistance to 30 bar. The bracelet version has a double-security folding clasp with micro-adjustment. These are HydroConquest GMT specifications; they are not confirmed specifications for the legacy Conquest GMT.
Rank #2
- Automatic L888 movement, hours, minutes, seconds and date Case, hours, minutes, seconds, and date. Screw-down and transparent with sapphire crystal case back
- Stainless steel with triple safety folding clasp and push-piece opening mechanism
- 5 Year International Warranty
Longines’ Media Center announcement dated 21 March 2024 says 41 mm HydroConquest GMT models launched in 2023 and that 43 mm models were added in 2024. The announcement describes the line with a 30 bar water-resistance rating, a unidirectional ceramic bezel, a screw-in crown, and a screw-down case back. It does not establish that the older Conquest GMT shared those features.
| Detail | Legacy Conquest GMT (L3.687.4 references) | Current HydroConquest GMT (L3.790.4.56.6) |
|---|---|---|
| Identity | Older Conquest GMT; search results identify L3.687.4.56.6 and L3.687.4.99.6. Official archive confirmation not established. | Current official Longines GMT line and reference identified on Longines’ US product page. |
| Case size | Not established for the exact legacy references. | 41 mm, according to Longines’ US product page. |
| Movement and reserve | Not established for the exact legacy references. | Automatic; up to 72 hours of power reserve, according to Longines’ US product page. |
| GMT/date and bezel | Exact display and bezel specifications not established for the exact legacy references. | GMT/date function and unidirectional rotating ceramic bezel, according to Longines’ US product page. |
| Water resistance | Not established for the exact legacy references. | 30 bar, according to Longines’ US product page and Longines’ 21 March 2024 announcement. |
| Current US listed price | Not established. | $3,350 was shown on Longines’ US product page when checked; price and stock may change. |
Is the Longines Conquest GMT still available?
Current new-stock availability for the legacy Conquest GMT has not been verified. The references surfaced through search evidence, but that does not show whether Longines or authorized retailers still sell them new. A pre-owned listing may appear, but its availability, condition, authenticity, and price depend on the individual seller and watch.
Rank #3
- Automatic L888 movement, hours, minutes, seconds and date Screw-down case back
- Stainless steel with double safety folding clasp
- 5 Year International Warranty
The HydroConquest GMT is the current official Longines alternative covered by the available product and press pages. Its current US page showed $3,350 for reference L3.790.4.56.6 at the time checked; that is a listing snapshot, not a guaranteed or recurring price.
Quick Recap
Rank #4
- Band Width (Size): This 22mm silicone watch band is compatible with the Longines Conquest L3.835 L3.830 watch. The length of the strap is about 113+90mm.Please measure the width of the connecting part where the band attached to the watch before placing order.
- Band Material: Made of premium soft silicone, this watch strap is durable, flexible,odorless, no fading.
- Comfortable Wear: This strap features smooth edges, soft touch,lightweight,odorless,not bulky and the silicone watch bands is extremely durable.Very easy to install and clean.
- Washable and Waterproof: Waterproof and easy to clean, this strap is ideal for outdoor fitness, sports, intense workouts, or everyday use, offering durability and convenience in all occasions.
- Fashionable Appearance：this rubber strap has a young and fashionable appearance.The design of this strap is very stylish,comfortable to wear, it is the best choice for everyday wear and exercise, and it will add luster to you and is enviable.
What to check before buying a legacy example
- Reference: Confirm the exact L3.687.4 reference and check that the watch, listing, and any documentation agree.
- Condition and authenticity: Examine the actual watch and request clear evidence; the available reference leads do not verify any particular listing.
- Technical details: Ask for documentation tied to the exact reference rather than assuming HydroConquest GMT dimensions, movement, or water resistance apply.
- Service and water use: Establish the watch’s service history and condition before relying on it, especially for water exposure; current support status for the legacy references is not established here.
- Price and availability: Compare current listings for the same exact reference and condition. No representative current market price is established.
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.
