Seiko Cal. 6657 - 764

The Seiko 6657-764 represents an important milestone in Seiko's 1976 lineup. It features a White dial protected by a Acrylic crystal and offers 30m of water resistance. [seikata-wm-97b160fea287]

Also known as: World Timer

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

34mm

Case Thickness

14.1mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

30m

Dial Color

White

Jewels

29j

Frequency

28,800 bph

Power Reserve

49 hours

Year

1976

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