Seiko Cal. 6640 - 767

The Seiko 6640-767 represents an important milestone in Seiko's 1982 lineup. The Fixed bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-889deb1567dc]

Also known as: Rally

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

37mm

Case Thickness

10.0mm

Lug Width

20mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

130m

Dial Color

Green

Jewels

28j

Frequency

36,000 bph

Power Reserve

57 hours

Year

1982

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