Seiko Cal. 4520 - 370

Seiko 4520-370

The 4520-370 is a sought-after Automatic piece from Seiko's golden era. Powered by the 4520 caliber with 30j jewels beating at 21,600 bph, it delivers a 36 hours power reserve. [seikata-wm-f8c9ee654f00]

Also known as: Helmet

Specifications

Movement
Automatic
Case Material
Titanium
Case Width
40mm
Case Thickness
15.1mm
Lug Width
19mm
Crystal
Acrylic
Bezel
Coin-Edge
Water Resistance
160m
Dial Color
Champagne
Jewels
30j
Frequency
21,600 bph
Power Reserve
36 hours
Year
1978

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