Seiko Cal. 5231 - 691

The 5231-691 is a sought-after Automatic piece from Seiko's golden era. Powered by the 5231 caliber with 33j jewels beating at 28,800 bph, it delivers a 71 hours power reserve. [seikata-wm-956782f1a3f2]

Also known as: Bullhead

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

39mm

Case Thickness

12.0mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

120m

Dial Color

White

Jewels

33j

Frequency

28,800 bph

Power Reserve

71 hours

Year

1993

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