Seiko Cal. 6643 - 290

This Spring Drive model from 1969 features a 37mm Stainless Steel case. It features a Black dial protected by a Sapphire crystal and offers 40m of water resistance. [seikata-wm-ee6ee1602e34]

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

37mm

Case Thickness

8.4mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

40m

Dial Color

Black

Jewels

22j

Frequency

36,000 bph

Power Reserve

48 hours

Year

1969

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