Seiko Cal. 4428 - 727

Released in 1965, the Cal. 4428 with design code 727 was part of Seiko's domestic market collection. The Bidirectional bezel and 38mm case give it a distinctive presence on the wrist. [seikata-wm-5cbfdf2701ae]

Also known as: Crown, Emperor

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

38mm

Case Thickness

12.8mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

180m

Dial Color

Cream

Jewels

23j

Frequency

28,800 bph

Power Reserve

51 hours

Year

1965

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