Seiko Cal. 6637 - 613

Released in 1988, the Cal. 6637 with design code 613 was part of Seiko's domestic market collection. The Coin-Edge bezel and 43mm case give it a distinctive presence on the wrist. [seikata-wm-5c0faa380bdd]

Also known as: Golden Tuna, Emperor

Specifications

Movement

Kinetic

Case Material

Gold-Plated

Case Width

43mm

Case Thickness

12.6mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

30m

Dial Color

White

Jewels

22j

Frequency

28,800 bph

Power Reserve

36 hours

Year

1988

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