Seiko Cal. 5655 - 768

The Seiko 5655-768 represents an important milestone in Seiko's 1977 lineup. Powered by the 5655 caliber with 28j jewels beating at 21,600 bph, it delivers a 50 hours power reserve. [seikata-wm-918125cc8841]

Also known as: Helmet

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

15.7mm

Lug Width

21mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

70m

Dial Color

Silver

Jewels

28j

Frequency

21,600 bph

Power Reserve

50 hours

Year

1977

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