7, USED, SALTILLO WITH SALTILLO CANCEL
8, USED, SALTILLO WITH SALTILLO CANCEL
7, MINT, NG, SAN LUIS POTOSI
9, MINT, NG, SAN LUIS POTOSI
6, USED, SAN LUIS POTOSI AND CANCEL, UNUSUAL OVERPRINT
7, USED, SAN LUIS POTOSI AND CANCEL
7, USED, PAIR, SAN LUIS POTOSI AND CANCEL, NICE
7, USED, SAN LUIS POTOSI AND CANCEL, NICE PAIR
8, USED, SAN LUIS POTOSI AND CANCEL
8, USED, SAN LUIS POTOSI, UNKNOWN CANCEL
7, USED, SAN LUIS POTOSI AND CANCEL ON PIECE
8, USED, SAN LUIS POTOSI AND CANCEL, ON PIECE
10, USED, TABASCO AND CANCEL
9, USED, TABASCO AND CANCEL
7, USED, TOLUCA AND CANCEL