Seiko Cal. 5631 - 485

The Seiko 5631-485 represents an important milestone in Seiko's 1966 lineup. Powered by the 5631 caliber with 27j jewels beating at 21,600 bph, it delivers a 40 hours power reserve. [seikata-wm-8a8def06dfda]

Also known as: Shogun, Bullhead

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

46mm

Case Thickness

13.9mm

Lug Width

20mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

180m

Dial Color

Black

Jewels

27j

Frequency

21,600 bph

Power Reserve

40 hours

Year

1966

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