Seiko Cal. 6131 - 251

This Spring Drive model from 1978 features a 45mm Gold-Plated case. Powered by the 6131 caliber with 25j jewels beating at 28,800 bph, it delivers a 54 hours power reserve. [seikata-wm-ca72aeb216a2]

Also known as: Sumo, Silverwave

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

45mm

Case Thickness

11.1mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

200m

Dial Color

Silver

Jewels

25j

Frequency

28,800 bph

Power Reserve

54 hours

Year

1978

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