Seiko Cal. 5637 - 643

This Automatic model from 1966 features a 40mm Hardlex-Coated Steel case. With its 20mm lug width and 13.5mm profile, it sits comfortably on most wrists. [seikata-wm-fb65d27af3c6]

Also known as: Rally, Emperor

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

13.5mm

Lug Width

20mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

50m

Dial Color

Silver

Jewels

31j

Frequency

36,000 bph

Power Reserve

60 hours

Year

1966

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