Seiko Cal. 5631 - 888

This Automatic model from 1984 features a 42mm Titanium case. Powered by the 5631 caliber with 30j jewels beating at 28,800 bph, it delivers a 43 hours power reserve. [seikata-wm-827e488f260c]

Also known as: Bullhead, Baby Tuna

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

42mm

Case Thickness

14.7mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

80m

Dial Color

Silver

Jewels

30j

Frequency

28,800 bph

Power Reserve

43 hours

Year

1984

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