Seiko Cal. 4428 - 344

The 4428-344 is a sought-after Automatic piece from Seiko's golden era. Powered by the 4428 caliber with 29j jewels beating at 21,600 bph, it delivers a 42 hours power reserve. [seikata-wm-725464287eaa]

Also known as: Helmet

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

44mm

Case Thickness

14.9mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

110m

Dial Color

Champagne

Jewels

29j

Frequency

21,600 bph

Power Reserve

42 hours

Year

1971

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