Seiko Cal. 4521 - 657

The 4521-657 is a sought-after Solar piece from Seiko's golden era. It features a Silver dial protected by a Sapphire crystal and offers 180m of water resistance. [seikata-wm-ad581e01c782]

Also known as: Helmet, Emperor

Specifications

Movement

Solar

Case Material

Stainless Steel

Case Width

36mm

Case Thickness

15.0mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

180m

Dial Color

Silver

Jewels

26j

Frequency

36,000 bph

Power Reserve

47 hours

Year

1978

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