Seiko Cal. 6691 - 170

The 6691-170 is a sought-after Spring Drive piece from Seiko's golden era. With its 18mm lug width and 8.6mm profile, it sits comfortably on most wrists. [seikata-wm-87d7de7fd7e1]

Also known as: Bullhead, Flighty

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

37mm

Case Thickness

8.6mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

60m

Dial Color

Black

Jewels

27j

Frequency

36,000 bph

Power Reserve

45 hours

Year

1985

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