Seiko Cal. 5677 - 664

The Seiko 5677-664 represents an important milestone in Seiko's 1965 lineup. Powered by the 5677 caliber with 18j jewels beating at 21,600 bph, it delivers a 61 hours power reserve. [seikata-wm-6883e2220129]

Also known as: Helmet

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

45mm

Case Thickness

14.8mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

110m

Dial Color

Silver

Jewels

18j

Frequency

21,600 bph

Power Reserve

61 hours

Year

1965

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