Seiko Alpinist model SBDC091. This is a Japanese market model which is sold in the US as model SPB121. Japanese made Seiko 6R35 automatic movement. Solid stainless steel case. Green dial with gold tone hands and markers. Sapphire crystal with bubble date magnifier. Brown alligator textured leather with deployment strap.
Promo:
Factory Model Number. SBDC091 (Known as SPB121 in the USA).
Movement:
SEIKO Mechanical Automatic ( Powered by wrist movement ). Caliber 6R35.
Functions:
Date calendar, window display.
Case:
Solid AISI 316L Stainless steel.
Bezel:
Rotating compass inner ring operated by separate crown.
Crystal:
Sapphire. Bubble date magnifier.
Dial:
Green color. Luminous ( radiation-free LumiBrite ) hour markers. Arabic applied numerals.
Hands:
Gold tone. LumiBrite radiation-free luminous filled.
Case Back:
Observation crystal. Screw-down style ( threaded ).
Band:
Brown color. Alligator style textured leather.
Clasp:
Deployant style, with spring release. Factory Logo engraved/embossed.
Water Resistance:
200m/660ft/20atm.
Case Size:
46.50mm. 39.50mm. 13.00mm.