Screw-down crown at the 4 o’clock position
Greater security is achieved by positioning the screw-lock crown at the 4 o’clock position.
The dial design has just one objective; maximum legibility, even deep in the ocean where sunlight does not penetrate. The hour markers are large, so as to allow the maximum surface area and depth for Seiko’s Lumibrite coating.
Screw-down crown and buttons
The crown and power reserve buttons have screw-down protection to prevent any accidental operation.
SEIKO Prospex SRPA21K1 Specifications :
|DRIVING SYSTEM||Automatic with manual winding mechanism|
|BAND||Stainless steel bracelet with three-fold clasp with secure lock, push button release with extender|
|GLASS MATERIAL||Hardlex glass|
|WATER RESISTANCE||200m Diver|
|FEATURES||Screw case back|
Magnetic resistance: 4,800 A/m