Seiko Cal. 6636 - 312

The Seiko 6636-312 represents an important milestone in Seiko's 1973 lineup. With its 20mm lug width and 10.0mm profile, it sits comfortably on most wrists. [seikata-wm-d17c369699e4]

Also known as: World Timer

Specifications

Movement

Kinetic

Case Material

Titanium

Case Width

39mm

Case Thickness

10.0mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

130m

Dial Color

Navy

Jewels

21j

Frequency

36,000 bph

Power Reserve

61 hours

Year

1973

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