Seiko Cal. 4420 - 711

Released in 1991, the Cal. 4420 with design code 711 was part of Seiko's domestic market collection. It features a Navy dial protected by a Hardlex crystal and offers 80m of water resistance. [seikata-wm-aa16badf8368]

Also known as: Sumo, Sportsmatic

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

45mm

Case Thickness

12.8mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

80m

Dial Color

Navy

Jewels

23j

Frequency

21,600 bph

Power Reserve

44 hours

Year

1991

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