Seiko Cal. 4428 - 412

The Seiko 4428-412 represents an important milestone in Seiko's 1974 lineup. Powered by the 4428 caliber with 26j jewels beating at 28,800 bph, it delivers a 39 hours power reserve. [seikata-wm-e70e7d87134d]

Also known as: Helmet, Goldfeather

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

14.8mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

200m

Dial Color

Cream

Jewels

26j

Frequency

28,800 bph

Power Reserve

39 hours

Year

1974

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