Seiko Cal. 4421 - 590

Released in 1994, the Cal. 4421 with design code 590 was part of Seiko's domestic market collection. Powered by the 4421 caliber with 32j jewels beating at 28,800 bph, it delivers a 70 hours power reserve. [seikata-wm-9de68febd0c0]

Also known as: Sumo, Helmet

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

42mm

Case Thickness

14.5mm

Lug Width

22mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

130m

Dial Color

White

Jewels

32j

Frequency

28,800 bph

Power Reserve

70 hours

Year

1994

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