Seiko Chronograph SSB397P1 - Quartz Cal. 8T63 - 2020s - 41mm Seiko chronograph reference SSB397P1 from the current Essentials line, caseback reference 8T63-00T0. Stainless steel 41mm case housing the Seiko quartz chronograph caliber 8T63 with 60-minute totalizer and 24-hour subdial. The SSB397 belongs to Seiko's racing-inspired chronograph family, with a dimensional embossed black dial designed to evoke an engine compartment, framed by a black tachymeter ring. The 8T63 caliber measures elapsed time in 1/5-second increments, and the 10 bar water resistance rating places it above the typical dress-chronograph spec. It is a straightforward, robust everyday chronograph on a solid-link steel bracelet with signed fold clasp. - Movement: Quartz chronograph, Seiko cal. 8T63 - Case: Stainless steel, 41mm (excluding crown), ~12.5mm thick - Dial: Black embossed pattern, applied indices, LumiBrite hands and markers - Crystal: Hardlex - Bracelet: Original Seiko steel bracelet, signed fold clasp, 22mm lug width - Functions: Hours, minutes, small seconds, date, chronograph (60 min), 24-hour indicator, tachymeter - Water resistance: 10 bar as marked — seals untested - Year: ca. 2021–2023 The watch is in good condition. The dial and hands are unblemished, the crystal is clean with only faint surface marks visible under magnification. The case shows light hairlines on the flanks and pushers consistent with normal wear; the bracelet shows typical light desk wear and the clasp closes firmly. [Movement runs correctly and chronograph functions start, stop, and reset properly — confirm over 24-hour test before publishing.] From a private collection. Original Seiko box included, no papers. Shipped fully insured, tracked, and signature-required worldwide.