Seiko Cal. 6639 - 660

The Seiko 6639-660 represents an important milestone in Seiko's 1985 lineup. Powered by the 6639 caliber with 23j jewels beating at 36,000 bph, it delivers a 68 hours power reserve. [seikata-wm-de4a2b91df67]

Also known as: Shogun, Goldfeather

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

35mm

Case Thickness

8.4mm

Lug Width

20mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

170m

Dial Color

Cream

Jewels

23j

Frequency

36,000 bph

Power Reserve

68 hours

Year

1985

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