Seiko Cal. 0731 - 181

This Solar model from 1973 features a 43mm Hardlex-Coated Steel case. It features a Navy dial protected by a Hardlex crystal and offers 30m of water resistance. [seikata-wm-c8a74e4de18e]

Also known as: Baby Tuna

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

8.6mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

30m

Dial Color

Navy

Jewels

31j

Frequency

21,600 bph

Power Reserve

65 hours

Year

1973

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