Seiko Cal. 4520 - 406

The 4520-406 is a sought-after Solar piece from Seiko's golden era. Powered by the 4520 caliber with 35j jewels beating at 21,600 bph, it delivers a 63 hours power reserve. [seikata-wm-004e7853b407]

Also known as: Helmet

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

44mm

Case Thickness

14.4mm

Lug Width

18mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

30m

Dial Color

Navy

Jewels

35j

Frequency

21,600 bph

Power Reserve

63 hours

Year

1965

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