Seiko Cal. 4420 - 931

This Spring Drive model from 1995 features a 37mm PVD Black case. With its 19mm lug width and 11.9mm profile, it sits comfortably on most wrists. [seikata-wm-94ffbc91e1d4]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

37mm

Case Thickness

11.9mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

170m

Dial Color

White

Jewels

36j

Frequency

28,800 bph

Power Reserve

71 hours

Year

1995

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