Seiko Cal. 4428 - 861

The Seiko 4428-861 represents an important milestone in Seiko's 1965 lineup. Powered by the 4428 caliber with 20j jewels beating at 36,000 bph, it delivers a 42 hours power reserve. [seikata-wm-caa7ace25912]

Specifications

Movement

Kinetic

Case Material

PVD Black

Case Width

39mm

Case Thickness

10.1mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

200m

Dial Color

Green

Jewels

20j

Frequency

36,000 bph

Power Reserve

42 hours

Year

1965

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