Seiko Cal. 6635 - 487

The 6635-487 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 6635 caliber with 20j jewels beating at 36,000 bph, it delivers a 68 hours power reserve. [seikata-wm-cc5f01820e45]

Also known as: Rally, Sportsmatic

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

11.2mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

120m

Dial Color

Green

Jewels

20j

Frequency

36,000 bph

Power Reserve

68 hours

Year

1972

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