Seiko Cal. 6655 - 722

The 6655-722 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6655 caliber with 17j jewels beating at 36,000 bph, it delivers a 48 hours power reserve. [seikata-wm-eeee0910bb7e]

Also known as: Bullhead, Crown

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

10.5mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

90m

Dial Color

Green

Jewels

17j

Frequency

36,000 bph

Power Reserve

48 hours

Year

1977

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