Seiko Cal. 6639 - 290

Released in 1974, the Cal. 6639 with design code 290 was part of Seiko's domestic market collection. It features a Green dial protected by a Acrylic crystal and offers 190m of water resistance. [seikata-wm-29434da024cd]

Also known as: Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

12.2mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

190m

Dial Color

Green

Jewels

34j

Frequency

21,600 bph

Power Reserve

57 hours

Year

1974

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