Seiko Cal. 4442 - 647

The Seiko 4442-647 represents an important milestone in Seiko's 1978 lineup. Powered by the 4442 caliber with 17j jewels beating at 36,000 bph, it delivers a 63 hours power reserve. [seikata-wm-75dfb7266d0b]

Also known as: Navigator, Flighty

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

44mm

Case Thickness

12.8mm

Lug Width

22mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

110m

Dial Color

Green

Jewels

17j

Frequency

36,000 bph

Power Reserve

63 hours

Year

1978

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