Seiko Cal. 5660 - 653

The Seiko 5660-653 represents an important milestone in Seiko's 1970 lineup. The Coin-Edge bezel and 34mm case give it a distinctive presence on the wrist. [seikata-wm-0fef0dc909b8]

Also known as: Helmet

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

34mm

Case Thickness

13.4mm

Lug Width

18mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

40m

Dial Color

Black

Jewels

22j

Frequency

21,600 bph

Power Reserve

39 hours

Year

1970

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