Stamps Year 1991

5853 - Orchid ophrys apifera
joaquín iturrioz
United States-Air mail
Herman Cudris Castañeda
DOG.
Herberth Sierra Licona
Stromsholm
Juan Martinez Ferrer
TRANSPORTATION CENTENARY
Herberth Sierra Licona
SATELLITES AND CIRCULAR ANTENNAS
Herberth Sierra Licona
1991 Europe and space.
Fernando Herrero
1395 - Centº of S.C.T.
joaquín iturrioz
1394 - Centº of S.C.T.
joaquín iturrioz
musical instruments
Pedro Gruenholz