Seiko Cal. 5631 - 697

This Automatic model from 1972 features a 35mm Stainless Steel case. Powered by the 5631 caliber with 25j jewels beating at 36,000 bph, it delivers a 70 hours power reserve. [seikata-wm-ba55d5427198]

Also known as: Monster, Pogue

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

35mm

Case Thickness

14.2mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

180m

Dial Color

Navy

Jewels

25j

Frequency

36,000 bph

Power Reserve

70 hours

Year

1972

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