Here's something new to me that I'm trying to get a better understanding of. So far, my research has told me that it's counterfeit or a reprint. Can anyone give me a little more info or help? How old is it? Is it junk or do I have something interesting? Is it even a postage stamp? You can't tell from the scan, but it does have gum on the back.
Well Dave the 1st issues for the Argentine Republic, as opposed to the earlier Confederation, issued in 1862 have this design.
The 15centavos is Catalogued about $250 .
However as you have learned they were "reprinted" ie reproduced as counterfeit.
Yours, in spite of the gum, is not genuine. It is a very common fake made way back in the 19th century for collectors who could not get access to the real one. Worth a few cents as a curiosity , no more.
The real colour is Ultramarine blue , the whole print is much crisper than this (In the shield there is a cap of liberty on a stand, the leaves round the badge are clearly defined
what ever it is , it's better than a poke in the eye from a wet umbrella!