Seiko Cal. 5617 - 607

The Seiko 5617-607 represents an important milestone in Seiko's 1977 lineup. Powered by the 5617 caliber with 20j jewels beating at 36,000 bph, it delivers a 64 hours power reserve. [seikata-wm-6209dfa9fabe]

Also known as: Helmet

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

38mm

Case Thickness

9.7mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

50m

Dial Color

Green

Jewels

20j

Frequency

36,000 bph

Power Reserve

64 hours

Year

1977

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