Seiko Cal. 4447 - 728

The Seiko 4447-728 represents an important milestone in Seiko's 1968 lineup. Powered by the 4447 caliber with 36j jewels beating at 28,800 bph, it delivers a 62 hours power reserve. [seikata-wm-a322ceaa2aa4]

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

38mm

Case Thickness

15.2mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

180m

Dial Color

Cream

Jewels

36j

Frequency

28,800 bph

Power Reserve

62 hours

Year

1968

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