Seiko Cal. 6691 - 777

The 6691-777 is a sought-after Hand-Winding piece from Seiko's golden era. The Bidirectional bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-f6951b1d2d95]

Also known as: Helmet, Emperor

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

37mm

Case Thickness

9.2mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

70m

Dial Color

Black

Jewels

24j

Frequency

36,000 bph

Power Reserve

43 hours

Year

1977

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