Seiko Cal. 5631 - 135

Seiko 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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