Current Production
SBGW305
GRAND SEIKO SBGW305
MSRP
$6,000 USD
Verified Aug 18, 2026
Case diameter37.3 mm
Lug-to-lug44.3 mm
Thickness11.7 mm
Case materialStainless steel
MovementManual winding
Calibre9S64
Power reserve72 hours
Specifications as published by Grand Seiko →
Last verified Aug 18, 2026