Seiko Cal. 5631 - 135

The 5631-135 is a sought-after Solar piece from Seiko's golden era. Powered by the 5631 caliber with 18j jewels beating at 21,600 bph, it delivers a 46 hours power reserve. [seikata-wm-bf2eb6e91272]

Also known as: Shogun, Bullhead

Specifications

Movement

Solar

Case Material

Stainless Steel

Case Width

38mm

Case Thickness

13.6mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

170m

Dial Color

Navy

Jewels

18j

Frequency

21,600 bph

Power Reserve

46 hours

Year

1981

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