# Serica 8315 GMT Chronometer Review by A.I. WatchMetrics


## Watch Summary
The Serica 8315 GMT Chronometer is a versatile 39mm tool watch blending sports and travel styles with vintage French military influences, highlighted by its innovative bi-directional 24-hour bezel for true GMT functionality, clean sunray dial with strong lume, and robust 200m water resistance, making it ideal for the enthusiast collector who values precision and legibility in an everyday traveler; it runs on the COSC-certified Sellita SW330-2 automatic movement offering a 42-hour power reserve.

## Overall Watch Rating: 7.3/10.0

**Brand Metric (7.0/10.0)** - Serica competes effectively in the entry-level luxury tier, delivering enthusiast-grade quality on par with Tudor or Oris tool watches.

**History & Innovation Metric (6.2/10.0)** - Drawing from 1960s French military designs with a clever bi-directional GMT bezel, it matches the niche innovation of brands like Glycine Airman.

**Rarity Metric (5.2/10.0)** - At its production scale and price, it provides moderate exclusivity similar to standard-run models from Zelos or Halios.

**Material Metric (9.4/10.0)** - 316L stainless steel case, double-domed AR sapphire crystal, and refined finishing benchmark against Omega's professional divers.

**Movement Metric (8.5/10.0)** - The COSC Sellita SW330-2 offers dependable GMT accuracy and reliability akin to ETA-powered GMTs in Nomos or Junghans.

**Complications Metric (5.0/10.0)** - The practical GMT setup delivers utility comparable to entry-level worldtimers from Longines.

**Functions Metric (7.2/10.0)** - Time, date, and dual-time GMT functions provide above-average everyday versatility like Hamilton's Khaki GMT.

**Dials & Design Metric (8.8/10.0)** - Sunray dial, applied indices, and superior lume achieve excellence matching Monta's acclaimed aesthetics.

**Versatility Metric (8.8/10.0)** - Excels from desk to adventure with GMT prowess, rivaling the all-scenario flexibility of a Rolex Explorer II.

## Total Performance Score (TPS): 4.2
## TPS Interpretation: Fair Value: The watch outperforms expectations in materials, design, and versatility while delivering solid movement quality at its price.
## WM Collector Grade: B-
## Performance Insights: Exceptional materials, design, versatility, and movement elevate it well above average, providing strong value versus its implied price of $1,100.

## Watch Data
[Picture URL] - https://serica-watches.com/wp-content/uploads/2023/05/8315-Black-1.jpg; [backPicture] - https://serica-watches.com/wp-content/uploads/2023/05/8315-back.jpg; [lumePicture] - -; [Nickname] - -; [Brand] - Serica; [Model] - 8315 GMT Chronometer; [Country] - France; [Product Link] - https://serica-watches.com/product/gmt-chronometer-8315-black/; [reviewLink] - -; [Movement Type] - Automatic; [Movement Name] - Sellita SW330-2; [# MSRP] - 1590; [# Secondary] - 1700; [# Production] - Unlimited; [watchDescription] - 39mm stainless steel GMT chronometer with bi-directional bezel, COSC Sellita automatic, 200m WR; [caseWidth] - 39; [lugToLugLength] - 46.5; [thickness] - 11.4; [lug] - 20; [waterResist] - 200; [powerReserve] - 42; [beatFrequency] - 28800; [lume] - Super-LumiNova X1 GL C1; [jewels] - 25; [caseMaterial] - 316L Stainless Steel; [watchGlass] - Double domed Sapphire AR; [Bezel] - Bi-directional 24h Aluminium; [caseback] - Screw-down Sapphire; [Crown] - Screw-down; [Strap] - FKM Rubber; [Shape] - Round; [Dial] - Black Sunray; [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] - 1; [Pilot] - 0; [racing] - 0; [Skeleton] - 0; [Vintage] - 0; [StyleFormal] - 0; [StyleCasual] - 1; [StyleSports] - 1; [StyleTravel] - 1; [StyleAdventure] - 1; [StyleCollector] - 1; [StyleTool] - 1; [StyleStatement] - 0; [StyleVintage] - 1; [StyleSmart] - 0; [StyleCustom] - 0; [TPS_new] - 4.2; [TPSgrade] - C+; [TPSimpliedPrice] - 1100;

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