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1Repair Windows errors before they cause bigger problems2Scan for outdated or missing drivers - takes under a minute3Clear out junk files and repair common Windows errorsThe Chronoswiss Pulse One Sand and Blue are two 2025 limited-edition watches built around the same unusual display: off-center hours at 12, central minutes, and a retrograde seconds hand at 6 that returns to the start of its arc every 30 seconds, according to Chronoswiss. Both pair that regulator-style layout with a Grade 5 titanium integrated-bracelet case and automatic caliber C.6001. Their main difference is the dial: warm, sandblasted 4N for Sand and blue CVD coating for Blue.
What is the Chronoswiss Pulse One Sand and Blue?
The Pulse One Sand and Blue are colorways on a shared platform, rather than watches with different mechanical specifications. Chronoswiss lists each as a limited edition of 100 pieces. The references are CH-6823T-BRSI for Sand and CH-6823T-BLSI for Blue.
The launch brought Chronoswiss’s regulator-style display into a 41 mm Grade 5 titanium case with an integrated titanium bracelet. The design retains recognizable brand details, including an onion-shaped crown and a knurled bezel. Fratello introduced the watches on March 18, 2025, while Eiko Watch’s Japanese announcement described them as 2025 novelties.
How the dial display works
This is not a conventional dial with three hands rotating from the center. The hour indication sits in its own off-center display at 12, the minute hand is central, and a curved retrograde seconds indication occupies 6 o’clock. Chronoswiss says the seconds hand sweeps along its arc and resets every 30 seconds.
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- PT5000 HIGH-BEAT AUTOMATIC MOVEMENT: Operating at 28,800 vibrations per hour for a smooth mechanical display, the PT5000 supports automatic winding, manual winding and hacking seconds for time setting. Power reserve is approximately 38–40 hours when fully wound.
- SUNRAY NO-DATE DIAL: Applied hour markers add depth to the clean three-hand layout. Blue and white dials use BGW-9 blue lume, while the vintage black dial uses C3 green lume. Luminous hands and markers support reading in low light after sufficient exposure to light.
- COMPACT 36MM PROPORTIONS: The case measures 36mm in diameter, 44.1mm lug to lug and 10.45mm thick, creating a restrained fit for smaller wrists or buyers who prefer classic dimensions. The lug width is 19mm, and the stainless steel bracelet is approximately 19.5cm long.
- SAPPHIRE CRYSTAL AND 100M WATER RESISTANCE: Sapphire crystal with AR coating helps protect the dial and reduce reflections. A screw-down crown and case back support 100M water resistance for daily wear and surface swimming when fully secured; not intended for scuba diving.
- 316L STEEL CASE AND FIVE-LINK BRACELET: The stainless steel case pairs a smooth fixed bezel with brushed and polished finishing. A tapered solid five-link steel bracelet completes the compact sports-watch profile and closes with a folding clasp.
The layout gives the dial a strong vertical structure and makes the seconds display a moving focal point. The maker describes that reset as a seamless motion; that is a description of the complication, not evidence of improved accuracy or timekeeping performance.
Sand and Blue: the differences
| Detail | Pulse One Sand | Pulse One Blue |
|---|---|---|
| Reference | CH-6823T-BRSI | CH-6823T-BLSI |
| Dial treatment | Sandblasted galvanic 4N finish; Chronoswiss describes the color as warm, natural brown | Deep blue CVD-coated dial |
| Indexes | CVD-coated | Rhodium-plated |
| Edition | 100 pieces, per Chronoswiss | 100 pieces, per Chronoswiss |
| Displayed price | $14,300 on the official US product page; market- and page-specific | €12,900 on the official EU product page; market- and page-specific |
The dial finish and index treatment are the clearest distinction. The listed US and EU prices do not form a direct comparison: they are displayed on different regional product pages, and currency, taxes, and page timing differ. Check the listing for the intended market for current pricing.
Case, bracelet, and dimensions
Chronoswiss’s technical sheet specifies a 41 mm diameter, 12.75 mm thickness, 46.27 mm lug-to-lug measurement, and 23 mm listed lug width. The case is described as a solid 26-piece Grade 5 titanium construction, with a curved, double-coated anti-reflective sapphire crystal, a screw-down case back with sapphire display, and 10-bar water resistance.
Rank #2
- DURABLE STAINLESS STEEL CASE WITH ROTATING BEZEL: The Casio MDV106 Series features a stainless steel case and screw-down crown, ensuring durability and reliability. The rotating bezel allows for easy time tracking, making it a practical choice for various activities. The sleek analog display with luminous markers enhances visibility.
- 200M WATER RESISTANCE FOR VERSATILE USE: Designed for water resistance up to 200 meters (660 feet), this watch is suitable for daily wear, outdoor activities, and water-related environments. The screw-down caseback and crown provide an extra layer of security, making this a reliable timepiece for various conditions.
- CLEAR ANALOG DISPLAY WITH DATE FUNCTION: The three-hand analog display with hour, minute, and second hands ensures precise timekeeping, while the date display at the 3 o’clock position allows for quick reference. The bold markers and luminous hands enhance readability, making it easy to check the time in various lighting conditions.
- STAINLESS STEEL BAND WITH SECURE CLASP: The stainless steel band with a one-touch 3-fold clasp provides a secure and adjustable fit for all-day comfort. Designed for durability, the stainless steel material offers a polished, stylish look, making it suitable for both casual and professional settings.
- LONG-LASTING BATTERY WITH ACCURATE TIMEKEEPING: Powered by a SR626SW battery, this watch delivers up to 3 years of operation with minimal maintenance. The quartz movement ensures precise timekeeping, with an accuracy of ±20 seconds per month, providing reliable performance for daily use.
The bracelet is an integrated Grade 5 titanium design. Although the sheet lists a 23 mm lug width, it also identifies the bracelet as integrated; that measurement alone does not establish that a conventional strap or another bracelet will fit. Confirm compatibility with Chronoswiss before considering a replacement.
These are manufacturer specifications, not a guarantee of fit. The measurements can help assess proportions, but personal fit depends on wrist shape and preference; no independent wearing assessment is established by the cited launch coverage.
Automatic caliber C.6001
Chronoswiss identifies the movement as its Manufacture Caliber C.6001 and says it was developed in collaboration with La Joux-Perret. The technical sheet lists 31 jewels, a frequency of 4 Hz (28,800 semi-oscillations per hour), and a 55-hour power reserve.
Rank #3
- PT5000 Automatic-self-wind movement with analog display dial
- Blue luminous from Switzerland . ceramic Time ring for diving .
- Diameter 40mm, thickness 13.5mm . Sapphire glass . three color dial
- Stainless Steel strap with premium stainless steel buckle
- 200 meters waterproof [can dive, swim, meet all daily waterproof use]
Other listed construction details include a tungsten skeletonized rotor, ball bearing, polished escapement components and screws, a Geneva-cut bridge, and ruthenium plating. These are manufacturer-provided technical details; they do not establish independently measured accuracy or durability.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Price, release, and availability
Regional pricing and launch information should be read in context rather than treated as a single global price. The official US Sand page displays $14,300, the official EU Blue page displays €12,900, and Chronoswiss’s international Sand page has displayed CHF 11,800. Eiko Watch’s April 11, 2025 Japanese announcement listed a suggested price of ¥2,585,000 including tax for each model and a planned Japan release in June 2025. These are market-specific page or announcement figures, not a like-for-like comparison or confirmation of current availability.
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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 →Chronoswiss’s product pages describe a three-stage reservation, allocation, and final delivery process. A live product page does not by itself confirm stock or a delivery date, and estimates or deposit amounts may change. Check the relevant regional listing directly for current terms.
Quick Recap
Sources and specifications
- Chronoswiss Pulse One Sand product page (US)
- Chronoswiss Pulse One Blue product page (EU)
- Chronoswiss PULSE One Technical Data
- Michael Stockton, Fratello Watches, March 18, 2025
- Eiko Watch Co., Ltd., Japanese launch announcement, April 11, 2025
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.
