Seiko Cal. 6639 - 254

Released in 1970, the Cal. 6639 with design code 254 was part of Seiko's domestic market collection. The Fixed bezel and 46mm case give it a distinctive presence on the wrist. [seikata-wm-fdbaa50ac3c9]

Also known as: Silverwave, Golden Tuna

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

46mm

Case Thickness

13.4mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

130m

Dial Color

Navy

Jewels

25j

Frequency

36,000 bph

Power Reserve

71 hours

Year

1970

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