The Mahendra Sagar Collection of Inverted Centers
October 5-6, 2011
| Images | Description | Current Bid |
 | Lot #361 NICARAGUA Air Post 1938 Issue, complete set of eight perforated singles and two souvenir sheets, all with centers inverted, also two imperf. souvenir sheets (centers upright), unused without gum as issued, fine-v.f.  (*)Catalog #C221B-Kvar | Price Realized $500.00 |
