Seiko Cal. 5231 - 631

The Seiko 5231-631 represents an important milestone in Seiko's 1970 lineup. It features a White dial protected by a Mineral crystal and offers 80m of water resistance. [seikata-wm-07b3ec4e2bf1]

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

38mm

Case Thickness

9.4mm

Lug Width

20mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

80m

Dial Color

White

Jewels

26j

Frequency

28,800 bph

Power Reserve

41 hours

Year

1970

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