Seiko Cal. 6651 - 691

The Seiko 6651-691 represents an important milestone in Seiko's 1978 lineup. With its 20mm lug width and 11.5mm profile, it sits comfortably on most wrists. [seikata-wm-439764d9a68a]

Also known as: Bullhead

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

34mm

Case Thickness

11.5mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

180m

Dial Color

Burgundy

Jewels

28j

Frequency

21,600 bph

Power Reserve

38 hours

Year

1978

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