Seiko Cal. 4427 - 663

The Seiko 4427-663 represents an important milestone in Seiko's 1977 lineup. Powered by the 4427 caliber with 21j jewels beating at 28,800 bph, it delivers a 52 hours power reserve. [seikata-wm-54ffd59ce374]

Also known as: Flighty

Specifications

Movement

Solar

Case Material

Titanium

Case Width

46mm

Case Thickness

8.7mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

130m

Dial Color

Green

Jewels

21j

Frequency

28,800 bph

Power Reserve

52 hours

Year

1977

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