Seiko Cal. 4428 - 257

The 4428-257 is a sought-after Solar piece from Seiko's golden era. The Inner Rotating bezel and 45mm case give it a distinctive presence on the wrist. [seikata-wm-55dd304d7599]

Also known as: UFO, Emperor

Specifications

Movement

Solar

Case Material

Titanium

Case Width

45mm

Case Thickness

10.3mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

170m

Dial Color

Blue Sunburst

Jewels

24j

Frequency

28,800 bph

Power Reserve

49 hours

Year

1968

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