Seiko Cal. 4428 - 738

The Seiko 4428-738 represents an important milestone in Seiko's 1992 lineup. Powered by the 4428 caliber with 31j jewels beating at 36,000 bph, it delivers a 44 hours power reserve. [seikata-wm-7bbc6df3e28e]

Also known as: World Timer

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

39mm

Case Thickness

12.0mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

150m

Dial Color

Silver

Jewels

31j

Frequency

36,000 bph

Power Reserve

44 hours

Year

1992

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