Seiko Cal. 6636 - 617

The 6636-617 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6636 caliber with 35j jewels beating at 21,600 bph, it delivers a 54 hours power reserve. [seikata-wm-bed8dd911d22]

Also known as: UFO, Golden Tuna

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

37mm

Case Thickness

15.8mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

60m

Dial Color

Blue Sunburst

Jewels

35j

Frequency

21,600 bph

Power Reserve

54 hours

Year

1970

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