Cuban coat of arms , country name on top, weight and fineness on sides, face value below.

Lettering:
REPUBLICA DE CUBA
12 G. 100 PESOS AU 0.917

Translation:
Republic of Cuba
12g. 100 Pesos gold 0.917

Engraver: Charles Edward Barber

Reverse

Christopher Columbus' vessel named "Pinta", date and mintmark upper left, name of vessel below.

Lettering:
DESCUBRIMIENTO DE AMERICA
1981
PINTA

Translation:
Discovery of America
1981
Pinta (vessel name - see comments)