Seiko Cal. 6639 - 181

The 6639-181 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 6639 caliber with 35j jewels beating at 21,600 bph, it delivers a 37 hours power reserve. [seikata-wm-19b2b87b6ba7]

Also known as: Silverwave, Sportsmatic

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

38mm

Case Thickness

15.2mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

140m

Dial Color

White

Jewels

35j

Frequency

21,600 bph

Power Reserve

37 hours

Year

1966

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