Seiko Cal. 5631 - 912

The 5631-912 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 5631 caliber with 30j jewels beating at 21,600 bph, it delivers a 37 hours power reserve. [seikata-wm-8b7046611e40]

Also known as: Panda

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

39mm

Case Thickness

15.2mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

200m

Dial Color

Black

Jewels

30j

Frequency

21,600 bph

Power Reserve

37 hours

Year

1971

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