Typographed on Grayish Paper With Security Printing on the Inside by the
Compañia Sudamerica de Billetes de Banco de Buenos Aires

Envelope Size: 151mm x 120mm

Embossed in Two Lines on Upper Right Back Flap
"CiA. SUD-AMERIC. DE BILLETES DE BANCO / BUENOS AIRES."

5c Master Die Proof in Red

5c Orange With Double Stamp Impression Error - the Second in Albino

ONLY KNOWN