Seiko Cal. 4420 - 321

The 4420-321 is a sought-after Spring Drive piece from Seiko's golden era. It features a Silver dial protected by a Mineral crystal and offers 70m of water resistance. [seikata-wm-04a9418d1feb]

Also known as: Bullhead

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

39mm

Case Thickness

9.2mm

Lug Width

18mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

70m

Dial Color

Silver

Jewels

21j

Frequency

36,000 bph

Power Reserve

72 hours

Year

1986

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