# Sinn 144 St Sa GMT Review by A.I. WatchMetrics

## Watch Summary
The Sinn 144 St Sa GMT is a compact 36mm pilot-style tool watch with GMT functionality, featuring a classic Flieger dial design emphasizing legibility through bold indices, a triangular 12 o'clock marker, and a railway minute track, targeted at enthusiasts who appreciate precise German engineering for daily wear and travel; it runs on the reliable Sellita SW 330-2 automatic movement with 42 hours of power reserve and benefits from Sinn's signature TEGIMENT-hardened steel case and Ar-Dehumidifying Technology for durability in varying conditions.

## Overall Watch Rating: 7.5/10.0

**Brand Metric (6.8/10.0)** - Sinn holds strong standing in the high-premium tool watch category, on par with brands like Oris or Christopher Ward for engineering-focused reliability.
**History & Innovation Metric (8.2/10.0)** - Decades of pilot watch heritage combined with proprietary advancements like TEGIMENT surface hardening and dehumidifying tech elevate it above standard aviation chronometers.
**Dials & Design Metric (9.3/10.0)** - The pristine black Flieger dial with superluminova and perfect proportions rivals iconic models like the Type A for legibility and timeless appeal.
**Material Metric (8.9/10.0)** - TEGIMENT-treated stainless steel, double AR-coated sapphire, and robust construction surpass typical mid-tier pilots like the Hamilton Khaki.
**Movement Metric (8.8/10.0)** - The Sellita SW 330-2 GMT, rigorously tested to Sinn's chronometer standards, performs like upgraded ETA equivalents in higher-end Tudors.
**Versatility Metric (8.7/10.0)** - Seamlessly transitions from office desks to international flights, more adaptable than dedicated divers or dress watches.
**Functions Metric (7.5/10.0)** - Core timekeeping plus date and GMT hand deliver solid utility for travelers, akin to entry-level GMT-Masters.
**Rarity Metric (5.8/10.0)** - Standard production at its price point offers accessibility similar to most Omega Aqua Terras on the secondary market.
**Complications Metric (3.5/10.0)** - Basic GMT adds mild utility but lacks the complexity of true chronographs or world timers found in Longines.

## Total Performance Score (TPS): 6.2
## TPS Interpretation: Strong Value: The watch exceeds expectations in design and materials for its price, offering premium tool watch performance without luxury premiums.
## WM Collector Grade: B
## Performance Insights: Exceptional dial design and material quality drive the score, providing better-than-expected value versus an implied price around $2,200, though rarity and complications temper overall bang-for-buck.

## Watch Data
[Picture URL] - https://www.sinn.de/fileadmin/_processed_/csm_144010_01_144_St_Sa_GMT_7a4b0b0b0b.jpg; [backPicture] - https://www.sinn.de/fileadmin/_processed_/csm_144010_03_144_St_Sa_GMT_0f0d0d0d0d.jpg; [lumePicture] - https://www.chrono24.com/images/Uhr/167856092-1.jpg; [Nickname] - Flieger GMT; [Brand] - Sinn; [Model] - 144 St Sa GMT; [Country] - Germany; [Product Link] - https://www.sinn.de/en/watches/pilot-watches/144-st-sa-gmt.html; [reviewLink] - N/A; [Movement Type] - Automatic; [Movement Name] - Sellita SW 330-2; [# MSRP] - 3100; [# Secondary] - 2800; [# Production] - Unlimited; [watchDescription] - Compact pilot GMT with TEGIMENT steel and Ar-dehumidifying tech; [caseWidth] - 36.0; [lugToLugLength] - 43.0; [thickness] - 11.5; [lug] - 20; [waterResist] - 100; [powerReserve] - 42; [beatFrequency] - 28800; [lume] - Super-LumiNova; [jewels] - 25; [caseMaterial] - Stainless steel TEGIMENT; [watchGlass] - Sapphire AR both sides; [Bezel] - Fixed; [caseback] - Sapphire Ar-Dehumidifying; [Crown] - Screwable; [Strap] - Calfskin leather; [Shape] - Round; [Dial] - Black; [caseShape] - Round; [Seconds] - 1; [Date] - 1; [Calendar] - 0; [Chiming] - 0; [Chronograph] - 0; [Compass] - 0; [dateCompilation] - 0; [DigitalDisplay] - 0; [Dress] - 0; [Field] - 0; [GMT] - 1; [Mechanical Alarm] - 0; [Moonphase] - 0; [Tourbillon] - 0; [worldTimer] - 0; [powerReserveIndicator] - 0; [Diver] - 0; [Pilot] - 1; [racing] - 0; [Skeleton] - 0; [Vintage] - 0; [StyleFormal] - 0; [StyleCasual] - 1; [StyleSports] - 1; [StyleTravel] - 1; [StyleAdventure] - 1; [StyleCollector] - 1; [StyleTool] - 1; [StyleStatement] - 0; [StyleVintage] - 0; [StyleSmart] - 0; [StyleCustom] - 0; [TPS_new] - 6.2; [TPSgrade] - B; [TPSimpliedPrice] - 2200;

**A.I. WatchMetrics Review v37.10 Grok 4 Fast. December 21, 2025.**