Seiko Cal. 5631 - 140

This Quartz model from 1975 features a 40mm Stainless Steel case. Powered by the 5631 caliber with 29j jewels beating at 21,600 bph, it delivers a 42 hours power reserve. [seikata-wm-66151fb19269]

Also known as: Golden Tuna, Arnie

Specifications

Movement

Quartz

Case Material

Stainless Steel

Case Width

40mm

Case Thickness

15.7mm

Lug Width

22mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

130m

Dial Color

Champagne

Jewels

29j

Frequency

21,600 bph

Power Reserve

42 hours

Year

1975

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