Seiko Cal. 5631 - 972

Seiko 5631-972

The 5631-972 is a sought-after Automatic piece from Seiko's golden era. The Coin-Edge bezel and 41mm case give it a distinctive presence on the wrist. [seikata-wm-2c897769867a]

Also known as: Bullhead, Sportsmatic

Specifications

Movement
Automatic
Case Material
PVD Black
Case Width
41mm
Case Thickness
15.0mm
Lug Width
21mm
Crystal
Sapphire
Bezel
Coin-Edge
Water Resistance
60m
Dial Color
Cream
Jewels
28j
Frequency
36,000 bph
Power Reserve
41 hours
Year
1967

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