Seiko Cal. 6613 - 657

The Seiko 6613-657 represents an important milestone in Seiko's 1978 lineup. It features a Champagne dial protected by a Hardlex crystal and offers 30m of water resistance. [seikata-wm-eaa89ab62344]

Also known as: Tuna, Emperor

Specifications

Movement

Kinetic

Case Material

Titanium

Case Width

42mm

Case Thickness

11.4mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

30m

Dial Color

Champagne

Jewels

23j

Frequency

36,000 bph

Power Reserve

40 hours

Year

1978

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