Seiko Cal. 4528 - 731

Seiko 4528-731

The Seiko 4528-731 represents an important milestone in Seiko's 1987 lineup. With its 22mm lug width and 13.4mm profile, it sits comfortably on most wrists. [seikata-wm-18cceea146f2]

Specifications

Movement
Hand-Winding
Case Material
PVD Black
Case Width
38mm
Case Thickness
13.4mm
Lug Width
22mm
Crystal
Sapphire
Bezel
Fixed
Water Resistance
90m
Dial Color
Cream
Jewels
34j
Frequency
28,800 bph
Power Reserve
40 hours
Year
1987

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