The Mahendra Sagar Collection of Inverted Centers
October 5-6, 2011
| Images | Description | Current Bid |
 | Lot #392 POLAND 1956 Olympics, 20gr Boxer, center inverted, l.h., fresh colors, v.f., only 14 examples are known to exist, signed Dr. Kronenberg, with his 1986 certificate, also with 2002 Philatelic Foundation Certificate, * Catalog #751a Catalog Value $ 23,000 | Price Realized $12,000.00 |
 | Lot #393 POLAND 1965 Dinosaurs, 30g Cryptocleidus, red and light Brown colors inverted, creating quite a striking error, n.h., minor gum bend, v.f., signed Krawczyk, with 2002 PFC. Only one sheet was printed and very few of these have found their way onto the auction block, one of the important modern errors of Europe, not to mention an exciting addition to a serious Dinosaur topical collection (Fisher 1422t) ** Catalog #1308var Catalog Value Zl 2,500 | Price Realized $1,600.00 |
 | Lot #394 POLAND 1987 Antarctic Base, 5zl vertical pair, both brown and purple colors inverted, the latter shifted, and resulting in completely missing ship from both stamps, cancelled to order, n.h., v.f., signed Schmutz, with 2003 Ceremuga certificate ("very rare as currently one error sheetlet (five pairs) recorded"), with a normal set of six on three FDCs included for comparison (Scott's No. 2782-2787) (Fischer 2929s) O Catalog #2782-83var Catalog Value Zl 1,500 | Unsold |
