Seiko Cal. 4521 - 866

The 4521-866 is a sought-after Spring Drive piece from Seiko's golden era. It features a Silver dial protected by a Hardlex crystal and offers 60m of water resistance. [seikata-wm-6b0ae84c96f6]

Also known as: Goldfeather, Bellmatic

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

42mm

Case Thickness

15.3mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

60m

Dial Color

Silver

Jewels

28j

Frequency

28,800 bph

Power Reserve

38 hours

Year

1997

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