Seiko Cal. 5231 - 674

The Seiko 5231-674 represents an important milestone in Seiko's 1976 lineup. It features a Silver dial protected by a Mineral crystal and offers 90m of water resistance. [seikata-wm-d6bfc4ba7924]

Also known as: Sumo, World Timer

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

45mm

Case Thickness

8.5mm

Lug Width

21mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

90m

Dial Color

Silver

Jewels

32j

Frequency

21,600 bph

Power Reserve

41 hours

Year

1976

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