Seiko Cal. 5631 - 285

The Seiko 5631-285 represents an important milestone in Seiko's 1969 lineup. Powered by the 5631 caliber with 24j jewels beating at 28,800 bph, it delivers a 58 hours power reserve. [seikata-wm-b48dccd49035]

Also known as: Bullhead, Rally

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

41mm

Case Thickness

8.7mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

30m

Dial Color

Champagne

Jewels

24j

Frequency

28,800 bph

Power Reserve

58 hours

Year

1969

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