Seiko Cal. 4423 - 670

This Automatic model from 1974 features a 36mm PVD Black case. It features a Navy dial protected by a Mineral crystal and offers 180m of water resistance. [seikata-wm-51c33481890e]

Also known as: Sumo, Helmet

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

36mm

Case Thickness

9.8mm

Lug Width

20mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

180m

Dial Color

Navy

Jewels

18j

Frequency

36,000 bph

Power Reserve

47 hours

Year

1974

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