Seiko Cal. 6636 - 424

The Seiko 6636-424 represents an important milestone in Seiko's 1965 lineup. With its 20mm lug width and 8.5mm profile, it sits comfortably on most wrists. [seikata-wm-157195accfc6]

Also known as: Emperor

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

34mm

Case Thickness

8.5mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

30m

Dial Color

Black

Jewels

36j

Frequency

21,600 bph

Power Reserve

71 hours

Year

1965

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