Seiko Cal. 6642 - 557

The Seiko 6642-557 represents an important milestone in Seiko's 1980 lineup. It features a Cream dial protected by a Acrylic crystal and offers 70m of water resistance. [seikata-wm-dce822be0a0f]

Also known as: Helmet, Flighty

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

38mm

Case Thickness

11.7mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

70m

Dial Color

Cream

Jewels

24j

Frequency

21,600 bph

Power Reserve

57 hours

Year

1980

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