Seiko Cal. 4420 - 613

The 4420-613 is a sought-after Spring Drive piece from Seiko's golden era. It features a Black dial protected by a Acrylic crystal and offers 140m of water resistance. [seikata-wm-231eecd9349f]

Also known as: Bullhead, Sea Horse

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

41mm

Case Thickness

10.6mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

140m

Dial Color

Black

Jewels

29j

Frequency

36,000 bph

Power Reserve

71 hours

Year

1990

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