Lot 489
489
unmounted mint Block of Four --, 1933, $4.50 on 75c Balbo Flight (C18, Gibbons 235), block of four, beautifully centered, never hinged, extremely fine, Elliot h.s. guarantee on reverse, Scott retail $1,900.00, Gibbons £1,000 photo

Details
unmounted mint Block of Four --, 1933, $4.50 on 75c Balbo Flight (C18, Gibbons 235), block of four, beautifully centered, never hinged, extremely fine, Elliot h.s. guarantee on reverse, Scott retail $1,900.00, Gibbons £1,000 photo