Seiko Cal. 4521 - 306

The 4521-306 is a sought-after Spring Drive piece from Seiko's golden era. It features a Burgundy dial protected by a Hardlex crystal and offers 190m of water resistance. [seikata-wm-fb70847bc636]

Also known as: Monster

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

37mm

Case Thickness

15.5mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

190m

Dial Color

Burgundy

Jewels

25j

Frequency

28,800 bph

Power Reserve

52 hours

Year

1997

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