Seiko Cal. 6646 - 237

The Seiko 6646-237 represents an important milestone in Seiko's 1975 lineup. With its 19mm lug width and 15.4mm profile, it sits comfortably on most wrists. [seikata-wm-dd9563f9bdbd]

Also known as: Shogun, Sea Horse

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

37mm

Case Thickness

15.4mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

110m

Dial Color

Champagne

Jewels

18j

Frequency

21,600 bph

Power Reserve

38 hours

Year

1975

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