Seiko Cal. 6644 - 143

The Seiko 6644-143 represents an important milestone in Seiko's 1977 lineup. With its 19mm lug width and 11.2mm profile, it sits comfortably on most wrists. [seikata-wm-ab4e4d1ea53e]

Also known as: Emperor

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

41mm

Case Thickness

11.2mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

30m

Dial Color

Black

Jewels

30j

Frequency

21,600 bph

Power Reserve

42 hours

Year

1977

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