Seiko Cal. 4428 - 551

The 4428-551 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 4428 caliber with 19j jewels beating at 28,800 bph, it delivers a 57 hours power reserve. [seikata-wm-511956739c9e]

Also known as: Bullhead, UFO

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

44mm

Case Thickness

10.7mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

140m

Dial Color

Blue Sunburst

Jewels

19j

Frequency

28,800 bph

Power Reserve

57 hours

Year

1968

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