Seiko Cal. 4428 - 795

This Spring Drive model from 1968 features a 34mm PVD Black case. Powered by the 4428 caliber with 27j jewels beating at 28,800 bph, it delivers a 43 hours power reserve. [seikata-wm-a4700b218111]

Also known as: Helmet

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

34mm

Case Thickness

15.0mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

90m

Dial Color

Cream

Jewels

27j

Frequency

28,800 bph

Power Reserve

43 hours

Year

1968

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