Vatican 885-887

Vatican 885-887, MNH, $7.75. Michel 1040-1042. Vatican Observatory, centenary, 1991. Astrograph for making photographic sky map, 1891; Zeiss Double Astrograph, Lake Castelgandolfo, 1935; New telescope, Vatican Observatory, Mt Graham, Arizona, 1991. Blocks of 4 - buy 4 sets (2).