The Mahendra Sagar Collection of Inverted Centers
October 5-6, 2011
| Images | Description | Current Bid |
 | Lot #290 ITALY Air Post Semi-Officials 1926 Trans-Polar Dirigible Flight "Norge" vignette, sheet of 20, inverted frame in position 16, usual minor offsets on back, n.h., v.f  ** | Price Realized $450.00 |
 | Lot #291 ITALY Air Post Semi-Officials 1926 Trans-Polar Dirigible Flight "Norge" vignette, vertical pair imperf. between, n.h., v.f., scarce ** | Price Realized $150.00 |
 | Lot #292 ITALY Air Post Semi-Officials 1926 Trans-Polar Dirigible Flight "Norge" vignette, two lower left sheet corner margin horizontal se-tenant pairs, one variety missing color (gray brown), each with frame inverted (position 16), n.h., the latter with creases, otherwise fine-v.f., scarce ** | Price Realized $240.00 |
 | Lot #293 ITALY Air Post Semi-Officials 1926 Trans-Polar Dirigible Flight "Norge" vignette, two imperforate horizontal pairs, one variety missing color (gray brown), n.h., some natural inclusions, v.f. ** | Price Realized $240.00 |
 | Lot #294 ITALY Air Post Semi-Officials 1926 Trans-Polar Dirigible Flight "Norge" vignette, horizontal imperforate gutter tete-beche pair, one variety missing color (gray brown), the other with inverted frame, n.h., folded between stamps, v.f., rare ** | Price Realized $375.00 |
 | Lot #295 ITALY Air Post Semi-Officials 1926 Trans-Polar Dirigible Flight "Norge" vignette, horizontal imperforate gutter tete-beche pair, one variety missing color (gray brown) and with frame inverted, n.h., folded between stamps, v.f., rare ** | Price Realized $425.00 |
 | Lot #296 ITALY Air Post Semi-Officials 1926 Trans-Polar Dirigible Flight "Norge" vignette, horizontal imperforate gutter tete-beche pair, one variety missing color (gray brown) also frame double one inverted, the other with gray color shifted, folded between stamps, unused without gum, also a regular stamp included for comparison, v.f., rare P | Price Realized $425.00 |
 | Lot #297 ITALY Air Post Semi-Officials 1926 Trans-Polar Dirigible Flight "Norge" vignette, horizontal imperforate pair, variety missing color (gray brown) frame double, unused without gum, also a regular stamp included for comparison, v.f., rare P | Price Realized $240.00 |
