The Bremont Altitude Perpetual Calendar GMT Mono-Pusher Skeleton is an openworked version of Bremont’s Altitude high-complication watch: its blue dial reveals the Agenhor-developed calendar and GMT mechanism, while retaining displays for home time, date, month and leap year, and running seconds. Bremont lists a 42mm Grade 2 titanium case, a hand-wound movement with a 50-hour power reserve, and a 50-piece limited edition.
What changes on the Skeleton version?
The defining change is visual. Instead of a closed dial, this version uses a blue skeletonised dial that exposes more of the movement architecture. Bremont describes applied luminous numerals and indices treated with white Super-LumiNova that emits blue light. The central hours and minutes remain the primary time display, with the calendar and GMT indications arranged around them.
The case pairs satin and polished Grade 2 titanium, with an Air Force Blue center barrel. A glassbox anti-reflective sapphire crystal protects the dial. These are Bremont’s stated design and material specifications; they are not the result of an independent hands-on inspection.
How are the time and calendar displays arranged?
| Position | Display |
|---|---|
| Center | Hours and minutes |
| 12 o’clock | 24-hour GMT globe |
| 9 o’clock | Small seconds |
| 6 o’clock | Date |
| 3 o’clock | Month and leap-year indication |
Bremont says the integrated mono-pusher crown and discreet correctors are used to adjust the watch. The calendar display combines month and leap-year information rather than giving each its own separate dial.
#1 Best Overall
- ⌚[Precision Automatic Movement] Engineered with a Japanese automatic movement for exceptional timekeeping accuracy, this self-winding watch delivers up to 45 hours of power reserve - requiring minimal manual winding while maintaining reliable performance.
- ⌚[Sophisticated Multifunction Design] Elevate your style with our premium mechanical timepiece featuring diamond hour markers and practical calendar complications (day/date/month display). Its versatile design transitions effortlessly from business meetings to formal events.
- ⌚[Durable Stainless Steel Construction] Crafted with 316L stainless steel and scratch-resistant mineral crystal, this water-resistant watch (3 ATM) withstands daily splashes and accidental exposure. The luminous hands ensure clear time reading even in low-light conditions.
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What movement does Bremont use?
Bremont identifies the hand-wound calibre as BHC9192-MH. The manufacturer lists 19 jewels, a Glucydur balance, a 50-hour power reserve, and stated accuracy of -6/+6 seconds. These are published specifications, not independently measured performance figures. Bremont’s official US product page is the primary source for those specifications.
In its November 20, 2025 launch report, Monochrome Watches describes the combined movement as a Sellita AMT6900 manual-winding base with an exclusive Agenhor perpetual-calendar and GMT module. That report gives a combined movement thickness of 6.8mm and a frequency of 28,800 vibrations per hour. It also describes the month and leap-year indication as a four-blade propeller hand that advances in 172 micro-steps over the four-year cycle. Those construction details are Monochrome’s reporting, rather than specifications independently verified here.
Rank #2
- With the new men’s Oceanographer GMT, Bulova brings exceptional functionality to one of its iconic designs.
- The stainless-steel case features a curved silhouette, a box sapphire crystal, a blue-and-red bidirectional rotating 24-hour bezel, and a screw-down crown providing 200m of water resistance. A brilliant blue dial is accented by tasteful pops of red, with applied luminescent hour markers, bold hands including a 24-hour hand and featuring luminescent paint, and a date display.
- An independently adjusted hour hand allows for easy setting of the local time. The Oceanographer GMT is powered by a self-winding GMT movement with 24-jewels and a power reserve of 42 hours, protected by a screw-down caseback
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- 200M Water Resistant and 3 Year Limited Warranty
Case dimensions and water resistance
Bremont’s product page, accessed October 8, 2026, specifies the following dimensions and protection:
| Specification | Bremont-stated value |
|---|---|
| Case diameter | 42mm |
| Case length | 49.62mm |
| Case depth | 12.65mm |
| Lug width | 22mm |
| Water resistance | 10 ATM / 100m |
| Crystal | Anti-reflective sapphire |
The 100m rating is the manufacturer’s stated water-resistance specification; it should not be read as a guarantee of suitability for every water activity or condition.
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Rank #3
- GMT Watch: A GMT watch for men; GMT function for tracking multiple time zones efficiently.Ideal for scheduling meetings and events across different time zones
- Dimension:Case Diameter: 39mm; Case Length: 48mm; Case Thickness: 14.5mm; Case Lugs Width: 20mm; Watch Weight: 71.5g; Swiss Landa 515-24H movement for accurate timekeeping. 316L stainless steel case for durability
- 200M Waterproof Watch: suitable for outdoor activities and water sports
- Durable Nylon strap: Lightweight and comfortable nylon strap in a simple blue and white color
- Impressive design: The product is designed to be stylish and is a must-have for going out and matching
Edition, pricing, and launch context
Bremont’s US product page lists the watch at $42,500 and says the edition is limited to 50 pieces. The price is the displayed US listing accessed October 8, 2026, and may change. Monochrome’s November 20, 2025 launch coverage reported a price of £37,000. These are figures from different market contexts and dates, not a single universal price.
Monochrome reported the skeletonised model as a Dubai Watch Week 2025 addition to the Altitude line, with availability limited by production capacity. It listed reference ALT42-PER-TI-BLSKL-B for the bracelet version and ALT42-PER-TI-BLSKL-H for the strap version. Bremont’s US page describes the edition as highly exclusive and offers appointment booking and retailer discovery; it also notes that hand-built-to-order models may have a lead time.
Rank #4
- PERFORMANCE A crown jewel of the Aquadiver collection, this men’s watch features a Swiss quartz movement with GMT dual time function for accurate tracking across time zones. A reliable men’s wrist watch for travel, work, and daily wear.
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- WATER RESISTANT UP TO 330FT (10 ATM) Engineered as a water resistant watch for men, suitable for swimming (while staying water-resistant up to 330 feet) and everyday exposure. A dependable men dive watch option among men’s watches.
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Bracelet, strap, and included items
Bremont lists a quick-release titanium bracelet and a blue patina leather strap, along with a limited-edition wooden box, document holder, and corrector tool. The published 22mm lug width does not by itself confirm compatibility with a particular replacement strap. Check the quick-release fit and the exact reference before buying an alternative.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.How to check availability
- Open Bremont’s official product page and confirm the current displayed price and purchase or appointment options for your market.
- Use Bremont’s retailer-discovery route to ask an authorized retailer about the specific configuration and reference you want.
- Confirm whether the watch is immediately available or built to order, and ask for the current lead time before placing an order.
- If considering a third-party marketplace, verify that the exact model and configuration are actually listed and in stock. The manufacturer and launch coverage cited here do not establish current Amazon inventory or an affiliate destination.
How it differs from the closed-dial Altitude perpetual calendar GMT
The useful distinction established by the available product information is the dial treatment: the Skeleton makes the movement architecture visible through its openworked blue dial, while the family also includes a closed-dial execution. Bremont’s listed US price for the Skeleton is $42,500; the dated launch report gives £37,000 for its launch-market context. Comparable current pricing, finish details, and reference availability for the closed-dial version are not stated in the cited product information, so a broader specification or price comparison cannot be made reliably from those sources.
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Best Value
- 43mm GMT Case Design: Crafted with a 43mm round case and balanced proportions, delivering a confident, travel-ready wrist presence.
- Bi-Directional Rotating Bezel: Features a functional bi-directional rotating bezel for intuitive GMT tracking and time zone reference.
- Dual-Time Quartz Movement: Powered by Swiss quartz GMT movement, allowing precise dual-time tracking for global travel.
- Durable Travel Construction: Protected by a mineral crystal with a screw-down crown and 50M (165 ft) water resistance for everyday reliability.
- Stainless Steel Bracelet Options: Secured with a solid 3-link bracelet, available in stainless steel or rose gold-tone, finished with a fold-over clasp.
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.
