Seiko Cal. 4420 - 431

Released in 1990, the Cal. 4420 with design code 431 was part of Seiko's domestic market collection. It features a Blue Sunburst dial protected by a Mineral crystal and offers 100m of water resistance. [seikata-wm-739bce3cb811]

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

45mm

Case Thickness

8.6mm

Lug Width

22mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

100m

Dial Color

Blue Sunburst

Jewels

24j

Frequency

28,800 bph

Power Reserve

41 hours

Year

1990

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