Seiko Cal. 5663 - 664

The Seiko 5663-664 represents an important milestone in Seiko's 1973 lineup. The Coin-Edge bezel and 39mm case give it a distinctive presence on the wrist. [seikata-wm-7512aa30685d]

Also known as: Helmet

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

39mm

Case Thickness

15.0mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

90m

Dial Color

Green

Jewels

21j

Frequency

28,800 bph

Power Reserve

72 hours

Year

1973

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