Cuba 1955 National Tuberc, Council Imperforate Horizontal Christmas Seal Pair on FDC, Double Printing ERROR, tied to green cacheted FDC with "OFICINA FILATELICA/CORREOS/-3 DIC1955/HABANA CUBA" FDOI circular date stamp cancel. The stamps appear to be the bottom of a S/S of 4. It also has a violet circular handstamp of a boy's head with tuberculosis symbol on it and "DIA DEL MEDICO" below; unaddressed. Very striking and obvious double strike error (Image)

$20