Seiko Cal. 6642 - 406

The Seiko 6642-406 represents an important milestone in Seiko's 1970 lineup. The Coin-Edge bezel and 36mm case give it a distinctive presence on the wrist. [seikata-wm-565a9f8fb7f0]

Also known as: Sportsmatic, World Timer

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

36mm

Case Thickness

12.0mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

110m

Dial Color

Burgundy

Jewels

22j

Frequency

28,800 bph

Power Reserve

52 hours

Year

1970

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