The Mahendra Sagar Collection of Inverted Centers
October 5-6, 2011
| Images | Description | Current Bid |
 | Lot #94 COSTA RICA 1907 5c yellow and dull blue, center inverted and misplaced showing parts of the vignette at both right and left, small h.r., minute thin from hinge removal mentioned for accuracy only, v.f. appearance. One of the most dramatic errors of this issue, with clear 2009 APS cert., ex-Mayer collection. Brian Moorehouse mentions that less than 10 copies of this variety exist, this probably only known with additionally displaced center * Catalog #62var | Unsold |
 | Lot #95 COSTA RICA 1907 2col claret and black, center inverted, near perfect centering, small h.r., light natural gum bend and minute perf. flaw at top (the latter not mentioned on accompanying certificate), still v.f. and exceedingly rare, with 2009 APS cert., ex-Mayer. Less than five copies are known of this error! * Catalog #68var | Unsold |
 | Lot #96 COSTA RICA 1921 Centenary of Central American Independence, 2c (two different shades), 3c, 15c and 30c imperforate, five different, each with center inverted, unused without gum, nice colors, fine-v.f. and rare group (*) Catalog #105/109var | Unsold |
 | Lot #97 COSTA RICA 1921 Centenary of Central American Independence, 3c green and black, block of four, two right stamps with centers inverted, n.h., some light gum staining, otherwise fine-v.f., with 2002 PFC  **Catalog #106var | Unsold |
 | Lot #98 COSTA RICA 1921 Centenary of Central American Independence, 15c dark blue and black, block of four, two right stamps with centers inverted, n.h., light gum staining, light diagonal crease affecting both errors, otherwise fine-v.f., with 2002 PFC **Catalog #108var | Unsold |
