Seiko Cal. 5637 - 323

This Spring Drive model from 1966 features a 36mm Stainless Steel case. With its 20mm lug width and 9.3mm profile, it sits comfortably on most wrists. [seikata-wm-69b0d5d5d4be]

Also known as: World Timer

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

36mm

Case Thickness

9.3mm

Lug Width

20mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

110m

Dial Color

White

Jewels

23j

Frequency

21,600 bph

Power Reserve

67 hours

Year

1966

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