Seiko Cal. 6633 - 251

This Spring Drive model from 1970 features a 42mm Stainless Steel case. With its 20mm lug width and 11.9mm profile, it sits comfortably on most wrists. [seikata-wm-25b7814c25a3]

Also known as: Helmet

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

42mm

Case Thickness

11.9mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

190m

Dial Color

Champagne

Jewels

30j

Frequency

28,800 bph

Power Reserve

53 hours

Year

1970

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