About the Design:

Obverse
Name of the country, bust of General José Eduvigis Díaz and year of issue below

Lettering:
REPUBLICA DEL PARAGUAY
GENERAL JOSE. E. DIAZ
Year

Translation:
Republic of Paraguay
General José E. Díaz
Year

Reverse
Value above, ruins of Humaitá

Lettering:
100
RUINAS DE HUMAITA 1865/70
GUARANIES

Translation:
100 Guaraníes
Ruins of Humaitá 1865-1870

Composition    Nickel-steel
Weight            3.75 g
Diameter    21.0 mm
Thickness    1.6 mm
Shape            Round