Seiko Cal. 4420 - 920

The 4420-920 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 4420 caliber with 28j jewels beating at 36,000 bph, it delivers a 68 hours power reserve. [seikata-wm-dbf4eb337905]

Also known as: Bullhead

Specifications

Movement

Kinetic

Case Material

Stainless Steel

Case Width

38mm

Case Thickness

14.6mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

190m

Dial Color

Silver

Jewels

28j

Frequency

36,000 bph

Power Reserve

68 hours

Year

1974

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