Seiko Cal. 5631 - 288

The Seiko 5631-288 represents an important milestone in Seiko's 1992 lineup. Powered by the 5631 caliber with 32j jewels beating at 36,000 bph, it delivers a 50 hours power reserve. [seikata-wm-e921718f1e3e]

Also known as: Pogue, Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

40mm

Case Thickness

14.3mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

100m

Dial Color

Green

Jewels

32j

Frequency

36,000 bph

Power Reserve

50 hours

Year

1992

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