Seiko Cal. 4528 - 635

Seiko 4528-635

The 4528-635 is a sought-after Automatic piece from Seiko's golden era. Powered by the 4528 caliber with 25j jewels beating at 21,600 bph, it delivers a 50 hours power reserve. [seikata-wm-766c85e2d6ed]

Also known as: Monster, Helmet

Specifications

Movement
Automatic
Case Material
Titanium
Case Width
35mm
Case Thickness
15.4mm
Lug Width
19mm
Crystal
Mineral
Bezel
Coin-Edge
Water Resistance
180m
Dial Color
Blue Sunburst
Jewels
25j
Frequency
21,600 bph
Power Reserve
50 hours
Year
1973

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