Seiko Cal. 4521 - 940

Released in 1973, the Cal. 4521 with design code 940 was part of Seiko's domestic market collection. With its 22mm lug width and 12.5mm profile, it sits comfortably on most wrists. [seikata-wm-ca5fca28da75]

Also known as: Emperor

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

12.5mm

Lug Width

22mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

170m

Dial Color

Blue Sunburst

Jewels

17j

Frequency

21,600 bph

Power Reserve

44 hours

Year

1973

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