Mongolia 1997 Princess Diana 1000f imperf m/sheet #3 and Westminster Abbey, the set of 6 progressive proofs comprising the 4 individual colours plus 2 composites, unmounted mint
Mongolia 1997 Princess Diana 1000f imperf m/sheet #3 and Westminster Abbey, the set of 6 progressive proofs comprising the 4 individual colours plus 2 composites, unmounted mint