Seiko Cal. 6639 - 135

The Seiko 6639-135 represents an important milestone in Seiko's 1978 lineup. Powered by the 6639 caliber with 33j jewels beating at 28,800 bph, it delivers a 39 hours power reserve. [seikata-wm-4a2c69522141]

Also known as: Silverwave

Specifications

Movement

Quartz

Case Material

Stainless Steel

Case Width

35mm

Case Thickness

13.6mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

200m

Dial Color

Navy

Jewels

33j

Frequency

28,800 bph

Power Reserve

39 hours

Year

1978

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