Seiko Cal. 4420 - 684

The 4420-684 is a sought-after Solar piece from Seiko's golden era. It features a Green dial protected by a Acrylic crystal and offers 130m of water resistance. [seikata-wm-6731e98328e9]

Also known as: Bullhead, Silverwave

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

45mm

Case Thickness

8.0mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

130m

Dial Color

Green

Jewels

22j

Frequency

28,800 bph

Power Reserve

45 hours

Year

1967

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