Seiko Cal. 5637 - 679

This Spring Drive model from 1970 features a 42mm Stainless Steel case. It features a Black dial protected by a Mineral crystal and offers 30m of water resistance. [seikata-wm-55085336ef53]

Also known as: Tuna, Emperor

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

42mm

Case Thickness

15.0mm

Lug Width

20mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

30m

Dial Color

Black

Jewels

29j

Frequency

21,600 bph

Power Reserve

56 hours

Year

1970

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