1850: 6 cs. black, plate 1, type 16, used, with a MA Seal cancel in
black, origin of which is unknown, four margins, fine used, very
rare,
1850: 6 cs. black, plate 1, type 16, used, with a MA Seal cancel in
black, origin of which is unknown, four margins, fine used, very
rare, probably a unique example. Cert. F. Graus (1997)