unused Block of Four 1951 15c. on 2½d. block of four, variety surcharge double, fine unmounted mint. A rare block. B.P.A. Certificate (1964). S.G. 38a, #2400+
unused Block of Four 1951 15c. on 2½d. block of four, variety surcharge double, fine unmounted mint. A rare block. B.P.A. Certificate (1964). S.G. 38a, #2400+
unused Block of Four 1951 15c. on 2½d. block of four, variety surcharge double, fine unmounted mint. A rare block. B.P.A. Certificate (1964). S.G. 38a, #2400+
