Seiko Cal. 4528 - 140

Seiko 4528-140

The 4528-140 is a sought-after Hand-Winding piece from Seiko's golden era. The Inner Rotating bezel and 39mm case give it a distinctive presence on the wrist. [seikata-wm-af793fc8326c]

Also known as: Sportsmatic, Baby Tuna

Specifications

Movement
Hand-Winding
Case Material
Titanium
Case Width
39mm
Case Thickness
13.9mm
Lug Width
20mm
Crystal
Hardlex
Bezel
Inner Rotating
Water Resistance
140m
Dial Color
Green
Jewels
32j
Frequency
28,800 bph
Power Reserve
64 hours
Year
1971

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