Seiko Cal. 6642 - 397

The Seiko 6642-397 represents an important milestone in Seiko's 1976 lineup. It features a Champagne dial protected by a Hardlex crystal and offers 80m of water resistance. [seikata-wm-0a24bc497bf8]

Also known as: Tuna, Sea Horse

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

36mm

Case Thickness

15.8mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

80m

Dial Color

Champagne

Jewels

34j

Frequency

28,800 bph

Power Reserve

67 hours

Year

1976

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