Seiko Cal. 4521 - 816

This Spring Drive model from 1977 features a 42mm PVD Black case. With its 18mm lug width and 12.2mm profile, it sits comfortably on most wrists. [seikata-wm-8f27e2f354d4]

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

42mm

Case Thickness

12.2mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

130m

Dial Color

Blue Sunburst

Jewels

34j

Frequency

28,800 bph

Power Reserve

69 hours

Year

1977

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