Hello.
This is what is in the Argentine forum about José de San Martin,
Argentina has many variants of jagged, paper, watermarks, printers, etc., in addition to a multitude of variants in the stamp itself, especially in the classic and definitive ones.
I think you have to register to see the images.
Good luck!
Regards.
https://foro.filateliaargentina.org...rum.php?f=78