Seiko Cal. 6617 - 722

The Seiko 6617-722 represents an important milestone in Seiko's 1966 lineup. Powered by the 6617 caliber with 18j jewels beating at 28,800 bph, it delivers a 65 hours power reserve. [seikata-wm-c8aa0283a0d3]

Also known as: Helmet, Emperor

Specifications

Movement

Solar

Case Material

Stainless Steel

Case Width

41mm

Case Thickness

8.2mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

180m

Dial Color

Silver

Jewels

18j

Frequency

28,800 bph

Power Reserve

65 hours

Year

1966

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