Seiko Cal. 6640 - 475

The Seiko 6640-475 represents an important milestone in Seiko's 1982 lineup. It features a Silver dial protected by a Mineral crystal and offers 150m of water resistance. [seikata-wm-106e1dc6c322]

Also known as: World Timer, Sea Horse

Specifications

Movement

Quartz

Case Material

Gold-Plated

Case Width

38mm

Case Thickness

14.0mm

Lug Width

18mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

150m

Dial Color

Silver

Jewels

22j

Frequency

28,800 bph

Power Reserve

71 hours

Year

1982

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