Seiko Cal. 6636 - 791

The 6636-791 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 6636 caliber with 35j jewels beating at 21,600 bph, it delivers a 37 hours power reserve. [seikata-wm-faaa5e6c8bb7]

Also known as: Flighty

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

37mm

Case Thickness

15.2mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

130m

Dial Color

Green

Jewels

35j

Frequency

21,600 bph

Power Reserve

37 hours

Year

1968

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