PANAMA (1949) Roosevelt*. Arosemena*. Block of 4 with doubled overprint of anti-cancer surcharge. Scott No RA28, Yvert No PA106.
AVAILABLE AT $80
PANAMA (1968) Flag of Brazil*. Rimet Cup*. Vertical misperforation resulting in stamp split into right and left halves. Scott No 4368c.
AVAILABLE AT $30