Seiko Cal. 6331 - 175

This Spring Drive model from 1965 features a 42mm Two-Tone case. Powered by the 6331 caliber with 17j jewels beating at 21,600 bph, it delivers a 68 hours power reserve. [seikata-wm-baf4d910d2b1]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

42mm

Case Thickness

8.5mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

150m

Dial Color

Navy

Jewels

17j

Frequency

21,600 bph

Power Reserve

68 hours

Year

1965

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