| British Guiana 1856 4c ... | |
| British Guiana 1856 4c Black/Magenta SG24 Very Fine & Fresh Looking Cut Squar... - Sold on eBay Sep 12, 2021 for $14,921.02 | |
| 1856 4c Black-Magenta SG24. British Guiana. Tiny 2mm shallow thin and Tiny pin hole, both of which are visible from rear only, whichbarely detracts from this exceptional example of a rare stamp. The Sister of the World Most Valuable Stamp, The 1c Magenta.... | |