Seiko Cal. 6661 - 555

The 6661-555 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 6661 caliber with 28j jewels beating at 21,600 bph, it delivers a 59 hours power reserve. [seikata-wm-3d8c3fe25daf]

Also known as: UFO, Goldfeather

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

42mm

Case Thickness

11.7mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

140m

Dial Color

Green

Jewels

28j

Frequency

21,600 bph

Power Reserve

59 hours

Year

1972

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