Seiko Cal. 6691 - 437

The 6691-437 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 6691 caliber with 33j jewels beating at 21,600 bph, it delivers a 59 hours power reserve. [seikata-wm-f1ec324b3d47]

Also known as: Sea Horse

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

38mm

Case Thickness

9.1mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

60m

Dial Color

Champagne

Jewels

33j

Frequency

21,600 bph

Power Reserve

59 hours

Year

1988

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