The Mahendra Sagar Collection of Inverted Centers
October 5-6, 2011
| Images | Description | Current Bid |
 | Lot #494 SPAIN 1937 Portico, 1p blue and orange, center inverted, imperf. single with large margins all around including portion of adjoining stamp at bottom, n.h., v.f., with APS certificate One of only a few imperforate inverted centers known ** Catalog #637a,var | Unsold |
