Seiko Cal. 4428 - 731

The Seiko 4428-731 represents an important milestone in Seiko's 1977 lineup. It features a Champagne dial protected by a Hardlex crystal and offers 40m of water resistance. [seikata-wm-9deaf4d64fcb]

Also known as: Pogue

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

41mm

Case Thickness

10.7mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Champagne

Jewels

21j

Frequency

36,000 bph

Power Reserve

50 hours

Year

1977

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