Venezuela Scott #1370a MNH SHEET of 10 Architects Engineers $$ os1
Uruguay Scott #1901 MNH Rodolfo V. Tálice Biologist CV$6+
Brazil Scott #1301 MNH S/S Nicolas Copernicus CV$23+ 408580
Paraguay note after Scott #876a IMPERF MNH S/S Einstein & Galileo CV$21+ 380991
Argentina Scott #772-C99 FIRST DAY COVER Symposium on Space Research $$ 378238
Chile Scott #836 MNH BLOCK of 4 Antarctic Institute Surveyor and Penguins CV$19+
Uruguay Scott #1620-1623 MNH Scientists from Uruguay CV$8+