Seiko Cal. 6643 - 187

This Automatic model from 1971 features a 43mm Two-Tone case. Powered by the 6643 caliber with 34j jewels beating at 36,000 bph, it delivers a 71 hours power reserve. [seikata-wm-f8e06fdf63e3]

Also known as: Monster, Goldfeather

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

43mm

Case Thickness

13.9mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

100m

Dial Color

Cream

Jewels

34j

Frequency

36,000 bph

Power Reserve

71 hours

Year

1971

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