Seiko Cal. 6397 - 631

This Spring Drive model from 1992 features a 41mm Gold-Plated case. Powered by the 6397 caliber with 32j jewels beating at 36,000 bph, it delivers a 50 hours power reserve. [seikata-wm-85bb93dd5aed]

Also known as: Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

41mm

Case Thickness

11.1mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

180m

Dial Color

Silver

Jewels

32j

Frequency

36,000 bph

Power Reserve

50 hours

Year

1992

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