Seiko Cal. 6647 - 810

This Quartz model from 1976 features a 36mm Two-Tone case. Powered by the 6647 caliber with 22j jewels beating at 36,000 bph, it delivers a 44 hours power reserve. [seikata-wm-637c7edc7abd]

Also known as: Monster, Sumo

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

36mm

Case Thickness

8.0mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

170m

Dial Color

Black

Jewels

22j

Frequency

36,000 bph

Power Reserve

44 hours

Year

1976

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