Seiko Cal. 4421 - 431

The Seiko 4421-431 represents an important milestone in Seiko's 1984 lineup. With its 21mm lug width and 9.6mm profile, it sits comfortably on most wrists. [seikata-wm-0ac423694548]

Also known as: Tuna

Specifications

Movement

Kinetic

Case Material

Stainless Steel

Case Width

37mm

Case Thickness

9.6mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

140m

Dial Color

Navy

Jewels

19j

Frequency

21,600 bph

Power Reserve

60 hours

Year

1984

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