Air Post stamps. 1950, 75th Anniversary of the UPU, 3fo carmine and dark brown, perforated and imperforated souvenir sheets of four, both are numbered at the bottom, perfect quality, full OG, NH, VF, C.v. $1,125 (Image)

Air Post stamps. 1951, 80th Anniversary of the First Hungarian Postage Stamps, 60f rose lilac, perforated and imperforated souvenir sheets of one, full OG, NH, VF, only 1,200 sets possible, C.v. $3,200 (Image)