The Mahendra Sagar Collection of Inverted Centers
October 5-6, 2011
| Images | Description | Current Bid |
 | Lot #241 GUATEMALA 1911 5p red and black, center inverted, top right corner margin block of six, used on piece, violet cancels, each with a vertical cut made by the Postmaster General when he found the error (known as the "slash" variety), fine-v.f., one of the largest known used multiples of this error, with 2002 PFC  Catalog #142a | Unsold |
