Seiko Cal. 4521 - 285

The 4521-285 is a sought-after Spring Drive piece from Seiko's golden era. With its 18mm lug width and 9.6mm profile, it sits comfortably on most wrists. [seikata-wm-d3d3b6f21c6a]

Also known as: Bellmatic, Crown

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

9.6mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

Silver

Jewels

21j

Frequency

28,800 bph

Power Reserve

39 hours

Year

1965

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