Seiko Cal. 6642 - 653

This Spring Drive model from 1970 features a 34mm Hardlex-Coated Steel case. It features a Green dial protected by a Mineral crystal and offers 160m of water resistance. [seikata-wm-eb53812e7835]

Also known as: Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

34mm

Case Thickness

9.0mm

Lug Width

18mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

160m

Dial Color

Green

Jewels

26j

Frequency

36,000 bph

Power Reserve

49 hours

Year

1970

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