Seiko Cal. 4520 - 360

The 4520-360 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 4520 caliber with 35j jewels beating at 36,000 bph, it delivers a 53 hours power reserve. [seikata-wm-7a054a27b347]

Also known as: Helmet

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

45mm

Case Thickness

15.0mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

180m

Dial Color

Burgundy

Jewels

35j

Frequency

36,000 bph

Power Reserve

53 hours

Year

1973

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