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The Astor+Banks Sea Ranger M2 pairs a 40 mm case with a La Joux-Perret G100 automatic movement and a rotating internal 12-hour ring for tracking a second time zone. Its specifications are appealing on paper, including a 68-hour power reserve, 300 m water resistance and brand-rated magnetic protection to 20,000 A/m. Published hands-on reviews praise its proportions and practical features, but one reviewer found the ring could shift while the crown was being secured.
What the Sea Ranger M2 is—and what makes it different
The Sea Ranger M2 is a dual-crown automatic tool watch. Its upper crown controls an internal rotating ring marked for 12 hours; the lower crown sets the time. That ring is intended to track a second time zone, rather than measure elapsed dive time like a conventional external dive bezel.
The distinction matters in use: the M2’s second-time-zone indication is useful for following another location over a 12-hour cycle, but it is not a 24-hour display. The ring sits beneath the crystal, which keeps it protected, though operating it involves the upper crown.
Specifications and current configuration
| Feature | Manufacturer’s Army Green listing |
|---|---|
| Case dimensions | 40 mm diameter; 45.5 mm lug-to-lug; 12.5 mm thick |
| Case | Brushed 316L stainless steel with a 1200 HV scratch-resistant coating |
| Movement | La Joux-Perret G100 automatic; 68-hour power reserve; manufacturer-stated adjustment of ±8 seconds per day |
| Second-time-zone display | Internal rotating 12-hour ring, operated by the upper crown |
| Crystal | Flat sapphire with underside anti-reflective coating |
| Water resistance | 30 ATM / 1000 ft |
| Magnetic protection | Soft-iron plates; brand-rated to 20,000 A/m |
| Dial and visibility | Matte Army Green dial; luminous hands and ring |
| Army Green bracelet configuration | Steel bracelet with quick-adjust buckle; listing says it includes a color-matched FKM rubber strap, Horween single-watch wallet and bracelet tool |
| Displayed price and warranty | $1,299 displayed on the manufacturer’s Army Green listing; listing advertises a five-year warranty |
Specifications, included accessories, price, stock, shipping and warranty terms can change. Check the live Astor+Banks Sea Ranger listing for the exact configuration and current terms before ordering.
The Tool Desk
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- Swiss Made Watch
- Movement: Automatic Mido Caliber - Power reserve 80 hours
- Case Type: Titanium with black ceramic bezel - Capable of withstanding pressures of up to 20 bar (200 m/660 ft), and equipped with a screw-down crown, this watch offers optimal protection against water.
- Case Size: 42.5mm - Case Thickness: 12.25mm - Black wave design dial with individually applied indexes coated with white Super-Luminova - Crystal: Sapphire crystal with double sided anti-reflection treatment
- Band Type: Titanium Bracelet - Folding Clasp with Diving Extension - Band Width: 22mm
How the internal 12-hour ring works
To use the ring, set it against the time in the second location using the upper crown. The ring then provides a 12-hour reference alongside the watch’s main time display. It is a straightforward way to monitor a second time zone without adding a second hour hand, but the 12-hour scale does not distinguish morning from evening by itself; the wearer must know whether the reference location is on its AM or PM half of the day.
The upper crown is the mechanism’s main usability trade-off. In his January 24, 2025 review, Zach Kazan of Worn & Wound found it difficult to keep the ring aligned while pushing the crown in and screwing it down. He reported that the ring could move slightly during that operation. That is a specific reviewer’s observation, not evidence that every example behaves identically, but it is worth considering if precise alignment is important to you.
Rank #2
- Stainless Steel case with Black Resin Band
- Black Dial with date window at 3 O'clock
- Luminous markers and hour hands; sweep second hand
- Anti-reverse bezel
- Water-resistant to 200 M (660 feet)
How it wears, including on a smaller wrist
The case measures 45.5 mm from lug to lug, a useful figure to compare with a watch that already fits well. Diameter alone does not determine fit: lug shape, wrist contour and the bracelet or strap all affect how a 40 mm watch sits.
Reviews offer encouraging but individual impressions. Kazan described the proportions as balanced and the watch as having a pleasing heft. Vincent Deschamps, reviewing the black version for Fratello on February 1, 2025, reported comfortable wear on his 16.5 cm (6.5 in) wrist. These experiences suggest the dimensions can work for some smaller-wrist wearers, but do not guarantee a fit for every wrist.
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- Refined Design & Upgraded Movement: Compared to the WD5512 V2 PT, the WD5512B features a reduced inner rehaut slope for a cleaner, flatter dial appearance. Powered by the reliable ST2130 high-beat automatic movement (28,800 bph) for smoother sweeping and better accuracy.
- Premium Materials: Crafted from solid 316L stainless steel with a sunburst blue or enamel black dial. Features a sapphire crystal with AR coating and a 2.5x date window convex magnifier for easy date reading.
- Pro-Grade Bezel & Luminous: Unidirectional 120-click chronograph bezel with a scratch-resistant ceramic top ring and a luminous marker at 12 o’clock. Filled with BGW-9 blue light luminous on hands and markers for superior low-light visibility.
- Built For Water - Solid Diver Construction: Compact 40mm case (48mm lug-to-lug) with an ultra-slim 11.8mm profile. Both crown and case back are screw-down design, delivering reliable water resistance for swimming, snorkeling, and everyday wet conditions.
- New Upgraded Clasp: Comes with our latest dual push-button clasp featuring 5 micro-adjustment holes, offering better comfort, precise fit, and enhanced security—easily adjust without tools.
What reviewers liked—and what gave them pause
Useful tool-watch specifications
The manufacturer lists 30 ATM water resistance, a 68-hour reserve and soft-iron plates rated by the brand to 20,000 A/m. Fratello’s review of the black version highlighted the magnetic protection, lume and scratch-resistant coating as useful tool-watch features. These are published specifications and a reviewer’s assessment; they should not be read as a substitute for appropriate care or as a guarantee of performance in every environment.
Lume, bracelet and strap impressions
Kazan praised the luminous bezel and described the bracelet as comfortable and the rubber strap as pliable. Deschamps also valued the luminous display and the bracelet’s quick-adjust clasp. These are subjective impressions from their respective reviews, not standardized tests.
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.
- DURABLE STAINLESS STEEL BUILD (42MM CASE) Commanding 42 mm watch size with a strong stainless steel bracelet for long-lasting wear. Designed as a durable wrist watch for men who want a solid, high-end feel without bulk discomfort.
- CLASSIC DIVER DESIGN WITH MODERN EDGE Built with a classic diver case and screw-down crown, this stainless steel watch for men combines sport and style. A bold yet refined mens sport watch that works as a mens work watch or formal watch for men.
- 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.
- BUILT FOR EVERYDAY & PROFESSIONAL USE Combining function and style, this classic watch fits business, casual, and active lifestyles. One of the best mens watches for those seeking a high end watch for men that combines premium design and performance.
Case-finish criticism
Kazan considered the brushed case finishing dull and the case geometry pedestrian. That is a matter of taste, but it points to a clear distinction: the M2’s appeal is rooted more in its dimensions and functional specification than in an especially distinctive case silhouette or finish, at least in that reviewer’s assessment.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Bracelet or FKM rubber strap?
The manufacturer’s Army Green bracelet listing says the configuration includes a color-matched FKM strap as well as a bracelet tool and Horween single-watch wallet. Check the exact live listing, since what is included can vary by configuration or change over time.
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Best Value
- 【Premium Automatic GMT Watch】Built around the reliable NH34 self-winding mechanical movement, this 43mm dive watch features an independent 24-hour GMT hand for dual-timezone tracking, 41-hour power reserve, and daily accuracy of -20 to +40 seconds. The dial is finished with a striking sunburst texture and a 3D logo at the 12 o'clock position, elevating the luxury feel.
- 【300M Professional Dive-Ready Build】Crafted from corrosion-resistant 316L stainless steel, this watch is built for underwater performance. It features a scratch-resistant unidirectional rotating ceramic bezel, a screw-down crown, and a screw-on exhibition caseback with sapphire crystal. With a 30ATM water resistance rating, it stands up to swimming, snorkeling, and professional diving activities.
- 【High-Visibility BGW9 Super Luminous】Legibility is key in low-light conditions. The hands, hour markers, and bezel are all infused with Swiss-grade BGW9 Super-LumiNova (not just coated), emitting a bright, pure blue glow after brief light exposure. This ensures over 90% night-time readability, so you can check the time clearly even in complete darkness.
- 【Durable & Versatile Construction】The watch is protected by a domed sapphire crystal with excellent clarity and wear resistance. The bracelet is made of solid 316L stainless steel, fitted with a secure dual-push dive extension clasp for a comfortable fit over wetsuits (3-7mm thick). It also includes a quick-release premium silicone strap for easy swaps between sporty and casual looks.
- 【Complete After-Sales & Gift Package】Each watch comes in a premium TOPHILL gift box, including the dive extension clasp, spring bar tool, and a watch cloth. We stand behind our product with a 30-day no-reason return policy and a 2-year warranty, ensuring you can shop with confidence.
Choose based on how you expect to wear the watch. A bracelet offers the quick-adjust buckle noted in the listing and appreciated by the Fratello reviewer; the rubber strap may suit a lighter, more flexible feel, which Kazan described as pliable. Fratello published historical prices of US$1,299 on bracelet and US$1,149 on FKM rubber in its February 2025 black-variant review. Those are dated figures, not current quotes. The manufacturer’s Army Green page displayed $1,299 when accessed in 2026.
Is the Astor+Banks Sea Ranger M2 worth considering?
The M2 makes the most sense for someone who wants a compactly proportioned, dual-crown automatic with a protected second-time-zone ring and substantial stated water and magnetic protection. Its 45.5 mm lug-to-lug measurement and 12.5 mm thickness are central fit considerations; published reviews found it comfortable on one 16.5 cm wrist and balanced in proportion, but trying it on remains the surest way to judge personal fit.
Before choosing it over a conventional dive watch, ask whether a 12-hour second-time-zone ring is more useful to you than an elapsed-time bezel. Also consider the crown-setting friction reported by Worn & Wound and whether the case finishing appeals to you. The feature set is compelling, but those details are the difference between specifications that look good and a watch that suits your daily preferences.
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.
