Seiko Cal. 6634 - 865

This Spring Drive model from 1979 features a 40mm Stainless Steel case. It features a Black dial protected by a Sapphire crystal and offers 190m of water resistance. [seikata-wm-269b1a2f9ea7]

Also known as: Helmet

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

40mm

Case Thickness

8.9mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

190m

Dial Color

Black

Jewels

34j

Frequency

36,000 bph

Power Reserve

43 hours

Year

1979

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