Seiko Cal. 4423 - 673

This Spring Drive model from 1988 features a 43mm Hardlex-Coated Steel case. With its 20mm lug width and 8.2mm profile, it sits comfortably on most wrists. [seikata-wm-3fb1da023aa0]

Also known as: Sumo, World Timer

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

8.2mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

70m

Dial Color

Green

Jewels

34j

Frequency

21,600 bph

Power Reserve

48 hours

Year

1988

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