Seiko Cal. 6640 - 646

This Automatic model from 1977 features a 41mm PVD Black case. The Fixed bezel and 41mm case give it a distinctive presence on the wrist. [seikata-wm-7befee30eb24]

Also known as: Monster, Arnie

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

41mm

Case Thickness

9.2mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

190m

Dial Color

Cream

Jewels

29j

Frequency

28,800 bph

Power Reserve

54 hours

Year

1977

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