The Mahendra Sagar Collection of Inverted Centers
October 5-6, 2011
| Images | Description | Current Bid |
 | Lot #505 SPAIN Officials 1916 Chamber of Deputies and Senate Issue, complete matched set of lower left sheet corner margin blocks of four, each with the bottom left stamp with center inverted, n.h., v.f. and scarce set of se-tenant blocks  **Catalog #O12-19var | Unsold |
