2193
unmounted mint Block of Four 1952 U.P.U. set of twelve, each in a corner block of four, unmounted mint. C.O.B. 880-891, B.F. 48,000

细节
unmounted mint Block of Four 1952 U.P.U. set of twelve, each in a corner block of four, unmounted mint. C.O.B. 880-891, B.F. 48,000