Seiko Cal. 5631 - 972

This Spring Drive model from 1979 features a 40mm Two-Tone case. Powered by the 5631 caliber with 23j jewels beating at 36,000 bph, it delivers a 66 hours power reserve. [seikata-wm-fb91ec00c3c9]

Also known as: Shogun, Sea Horse

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

40mm

Case Thickness

10.5mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

White

Jewels

23j

Frequency

36,000 bph

Power Reserve

66 hours

Year

1979

Related Models

• Seiko 3871-772
• Seiko 7027-990
• Seiko 4462-880
• Seiko 5287-524
• Seiko 6186-923
• Seiko 5255-395
• Seiko 6156-752
• Seiko 7121-770
• Seiko 6332-510
• Seiko 3826-943
• Seiko 5660-383
• Seiko 3820-441