First Day Covers issue and Real letters with stamps

First Day Covers (FDC)

It is specially designed envelopes with postage stamp “canceled” with a special postmark ready for use at the “First Day” of movement of such postage stamp. Today the postmark “First Day of Issue” can still be used for purposes of collection, in the philatelic offices Correo Argentino.

Diplomatic relations with China

Real letters with Postage Stamps

It consists of royal letters “really sent” by mail to a recipient with special stamps cancelled with postmarks.

A real letter sent from Montevideo to Buenos Aires