Seiko Cal. 4420 - 650

The 4420-650 is a sought-after Hand-Winding piece from Seiko's golden era. It features a Cream dial protected by a Hardlex crystal and offers 140m of water resistance. [seikata-wm-642293d74c57]

Also known as: Sumo, Bullhead

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

39mm

Case Thickness

9.6mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

140m

Dial Color

Cream

Jewels

33j

Frequency

21,600 bph

Power Reserve

37 hours

Year

1982

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