Oman 1986 Queen's 60th Birthday imperf deluxe sheet (5R value) with AMERIPEX opt in blue, set of 5 progressive proofs comprising single & various composite combinations unmounted mint
Oman 1986 Queen's 60th Birthday imperf deluxe sheet (5R value) with AMERIPEX opt in blue, set of 5 progressive proofs comprising single & various composite combinations unmounted mint