An unlisted Argentina #101 1931 Christmas seal poster (183 x 245 mm) was recently discovered. It is likely that more than a few old time seal collectors knew about this poster, but considered it outside the scope of Green's Catalog. It is very similar to the listed window label #101w (86 x 117 mm), but larger. Both feature a woman and child affixing #101 Christmas seals on Christmas cards and gifts.
This seal, #101 1931 pictures swallows and nest, and is the first in a series issued by the Jose Penna Institute for Infectious Diseases (Instituto de Enfermedades Infecciosas "Jose Penna"). This charitable TB fundraising society issued seals thru 1949, when a Juan Peron government decree stopped the issuance of all fundraising or charity seals after 1948 (except their own, see 02/18/2021 news item), making the 1949 seal rare.
The Jose Penna Institute wasn't the only charitable fundraising TB seal society stopped by this government decree. The Liga Argintina Contra La Tuberculosis de Rosario also issued a pane of 5 different seals in 1949. Picturing a portrait of Dr. Clemente Alvarez. I wish I could illustrate it here, however it is so rare it is not in our reference collection.