Seiko Cal. 4521 - 437

The 4521-437 is a sought-after Automatic piece from Seiko's golden era. With its 20mm lug width and 10.1mm profile, it sits comfortably on most wrists. [seikata-wm-300efd6fcc8e]

Also known as: Helmet, Goldfeather

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

43mm

Case Thickness

10.1mm

Lug Width

20mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

120m

Dial Color

Blue Sunburst

Jewels

24j

Frequency

21,600 bph

Power Reserve

62 hours

Year

1976

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