SK18 Seiko Alpinist. Reference SARB017. Watch measures a modest 38mm and is made from steel. Automatic Seiko movement caliber 6R15 which provides for 50 hours of power reserve. Sapphire crystal on the front and a closed case back. Waterproof 20ATM or 200 meters. Functions are hours, minutes, sweep seconds, date and inner rotating bezel with compass. This watch is fitted with the original (unused) leather strap with steel pin buckle. Naturally this watch is complete with the original box and (undated) Japanese papers. Great classic collectible! SOLD