Seiko Cal. 4428 - 172

The Seiko 4428-172 represents an important milestone in Seiko's 1988 lineup. Powered by the 4428 caliber with 18j jewels beating at 28,800 bph, it delivers a 59 hours power reserve. [seikata-wm-07383aea7131]

Also known as: Bullhead, Bellmatic

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

44mm

Case Thickness

13.1mm

Lug Width

21mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

200m

Dial Color

Green

Jewels

18j

Frequency

28,800 bph

Power Reserve

59 hours

Year

1988

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