The Serica 5303 stands out in the dive watch category. It features a unique dual bezel insert with a brushed steel inner ring and a ceramic outer ring, paired with a distinct dial layout that places index markings toward the center.
Overview
Brand: Serica
Model: 5303 COSC Diver
Collection: 5303
Price: €1,290–€1,390 EUR
Website: serica-watches.com
Specifications
Case Diameter: 39.0mm
Thickness: 12.2mm
Lug to Lug: 46.5mm
Lug Width: 20.0mm
Water Resistance: 300m
Case Material: 316L Stainless Steel
Crystal: Sapphire
Strap/Bracelet: Mesh Steel Bracelet
Design & Wearability
Measuring 39mm in case diameter, the 5303 has vintage proportions. The integrated steel mesh bracelet tapers comfortably and features a signed sliding buckle.
Movement & Performance
Powering the watch is the Swiss Soprod Newton automatic caliber, certified by the COSC. It operates at 28,800 vph, has a 44-hour power reserve, and is adjusted for reliable accuracy.
Official Website
Serica 5303 COSC Diver product page






