Seiko Cal. 6311 - 141

This Spring Drive model from 1969 features a 35mm PVD Black case. Powered by the 6311 caliber with 30j jewels beating at 21,600 bph, it delivers a 71 hours power reserve. [seikata-wm-3edc8fd5f4cf]

Also known as: Sumo, Tuna

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

35mm

Case Thickness

11.5mm

Lug Width

18mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

60m

Dial Color

White

Jewels

30j

Frequency

21,600 bph

Power Reserve

71 hours

Year

1969

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