Seiko Cal. 4520 - 378

The 4520-378 is a sought-after Solar piece from Seiko's golden era. It features a Silver dial protected by a Sapphire crystal and offers 110m of water resistance. [seikata-wm-9000c0f0b99d]

Also known as: Sumo, Pogue

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

36mm

Case Thickness

8.5mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

110m

Dial Color

Silver

Jewels

26j

Frequency

28,800 bph

Power Reserve

59 hours

Year

1974

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