Seiko Cal. 6690 - 171

The Seiko 6690-171 represents an important milestone in Seiko's 1967 lineup. Powered by the 6690 caliber with 20j jewels beating at 36,000 bph, it delivers a 39 hours power reserve. [seikata-wm-9097a174caba]

Also known as: Helmet, Flighty

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

46mm

Case Thickness

13.0mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

80m

Dial Color

Green

Jewels

20j

Frequency

36,000 bph

Power Reserve

39 hours

Year

1967

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