Seiko Cal. 5644 - 102

The Seiko 5644-102 represents an important milestone in Seiko's 1970 lineup. With its 18mm lug width and 11.2mm profile, it sits comfortably on most wrists. [seikata-wm-84d8ff8ce30d]

Also known as: Emperor

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

40mm

Case Thickness

11.2mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

40m

Dial Color

Green

Jewels

29j

Frequency

36,000 bph

Power Reserve

59 hours

Year

1970

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