Grand Seiko
44GS Spring Drive
Ref. SBGA373
The Grand Seiko SBGA373 is a modern reinterpretation of the iconic 44GS model (originally launched in 1967), featuring the unique Spring Drive movement (caliber 9R65) in a 40mm steel case. It combines heritage design with contemporary engineering, including a 72-hour power reserve, power reserve indicator, and a radiant Zaratsu-polished case. The watch is celebrated for its precision, elegance, and the distinctive gliding second hand of the Spring Drive mechanism.
crownScrew-down
crystalDual-curve sapphire (slightly domed, anti-reflective)
braceletStainless steel with three-fold clasp
casebackStainless steel with sapphire crystal
movement9R65, Spring Drive, automatic, 72-hour power reserve, ±1 second/day (±15 seconds/month), 30 jewels, hacking second hand
functionsDate, power reserve indicator
lug width19mm
dial colorChampagne (silver)
case length46.2mm
case diameter40mm
case materialStainless steel
case thickness12.5mm
water resistance100 meters
magnetic resistance4,800 A/m
year2018-present
A registered Grand Seiko SBGA373 carries a permanent RGATT passport: origin, history and owners, verifiable by anyone, and a documented history makes a watch easier to sell.