Seiko Cal. 6631 - 546

This Solar model from 1971 features a 37mm Two-Tone case. Powered by the 6631 caliber with 27j jewels beating at 21,600 bph, it delivers a 40 hours power reserve. [seikata-wm-fc51a6c80654]

Also known as: Samurai, Sumo

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

37mm

Case Thickness

12.3mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

50m

Dial Color

Silver

Jewels

27j

Frequency

21,600 bph

Power Reserve

40 hours

Year

1971

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