Seiko Cal. 5664 - 661

The Seiko 5664-661 represents an important milestone in Seiko's 1966 lineup. Powered by the 5664 caliber with 27j jewels beating at 36,000 bph, it delivers a 43 hours power reserve. [seikata-wm-aa92f2359fcc]

Also known as: Helmet

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

34mm

Case Thickness

14.8mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

190m

Dial Color

Cream

Jewels

27j

Frequency

36,000 bph

Power Reserve

43 hours

Year

1966

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