Seiko Cal. 6633 - 918

This Spring Drive model from 1971 features a 40mm Stainless Steel case. It features a Silver dial protected by a Sapphire crystal and offers 140m of water resistance. [seikata-wm-fe3088f1a4cb]

Also known as: Silverwave

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

40mm

Case Thickness

10.7mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

140m

Dial Color

Silver

Jewels

33j

Frequency

36,000 bph

Power Reserve

63 hours

Year

1971

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