Seiko Cal. 4447 - 727

The Seiko 4447-727 represents an important milestone in Seiko's 1972 lineup. Powered by the 4447 caliber with 18j jewels beating at 21,600 bph, it delivers a 51 hours power reserve. [seikata-wm-fe07e3ba1487]

Also known as: Silverwave

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

41mm

Case Thickness

14.4mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

110m

Dial Color

Green

Jewels

18j

Frequency

21,600 bph

Power Reserve

51 hours

Year

1972

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