Typographed on Cream Cartolina by the
Compañia Sudamerica de Billetes de Banco de Buenos Aires
Card Size: 131mm x 79mm

Design Proofs Without "TARJETA POSTAL" Inscription
Unissued 1c Yellow Green and 4c Olive Green

BOTH ONLY KNOWN

1905, DECEMBER 17: NARAT to SAAR, GERMANY
4c Type I blue green card uprated to 6c outbound card rate. 
January 11 (1906) entry on front. 
Set of 4: 5c Color Proofs With Small Embossed Liberty Head

On White Cartolina
Endorsed "Para sobres a tarjetas".

On Buff Cartolina