Seiko Cal. 7177 - 456

The Seiko 7177-456 represents an important milestone in Seiko's 1966 lineup. Powered by the 7177 caliber with 21j jewels beating at 36,000 bph, it delivers a 42 hours power reserve. [seikata-wm-9ebd1dd8294f]

Also known as: Helmet

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

41mm

Case Thickness

11.9mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

180m

Dial Color

Green

Jewels

21j

Frequency

36,000 bph

Power Reserve

42 hours

Year

1966

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