Seiko Cal. 6639 - 313

The Seiko 6639-313 represents an important milestone in Seiko's 1974 lineup. It features a Cream dial protected by a Hardlex crystal and offers 130m of water resistance. [seikata-wm-aae86c7e0edb]

Also known as: Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

38mm

Case Thickness

13.6mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

130m

Dial Color

Cream

Jewels

24j

Frequency

21,600 bph

Power Reserve

60 hours

Year

1974

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