Seiko Cal. 5651 - 645

The Seiko 5651-645 represents an important milestone in Seiko's 1981 lineup. With its 19mm lug width and 15.9mm profile, it sits comfortably on most wrists. [seikata-wm-ac37d3a654df]

Also known as: Crown

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

15.9mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

40m

Dial Color

Silver

Jewels

26j

Frequency

36,000 bph

Power Reserve

55 hours

Year

1981

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