Seiko Cal. 5634 - 998

This Spring Drive model from 1965 features a 45mm PVD Black case. The Rotating bezel and 45mm case give it a distinctive presence on the wrist. [seikata-wm-e1d9ca844b79]

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

45mm

Case Thickness

13.0mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

200m

Dial Color

Green

Jewels

30j

Frequency

28,800 bph

Power Reserve

45 hours

Year

1965

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