Seiko Cal. 6131 - 345

This Spring Drive model from 1981 features a 40mm PVD Black case. Powered by the 6131 caliber with 36j jewels beating at 28,800 bph, it delivers a 48 hours power reserve. [seikata-wm-33ab31da64ba]

Also known as: Crown

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

40mm

Case Thickness

10.8mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

50m

Dial Color

Cream

Jewels

36j

Frequency

28,800 bph

Power Reserve

48 hours

Year

1981

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