Collection. VALUABLE COLLECTION IN A BLUE STOCKBOOK: 1913-64, over 500 mainly mint stamps and one souvenir sheet, starting with mint Double-Headed Eagle overprints (all questionable and not counted), then early used items, including ''7.Mars'' overprints (C.v. €500), nice definitive and commemorative sets thereafter with Gagarin maroon overprints x4, valuable semi-postal and air post issues, occasional gum problem possible, full OG, NH (after 1945) or LH/hinged, F/VF, Mi C.v. €8,300 (Image)