Seiko Cal. 5633 - 679

This Hand-Winding model from 1978 features a 40mm Stainless Steel case. Powered by the 5633 caliber with 24j jewels beating at 21,600 bph, it delivers a 46 hours power reserve. [seikata-wm-027b756e6fce]

Also known as: Helmet

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

40mm

Case Thickness

8.5mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

170m

Dial Color

Burgundy

Jewels

24j

Frequency

21,600 bph

Power Reserve

46 hours

Year

1978

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