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| Catalog Number | C4 |
| Description | Mercury and Western Hemisphere |
| Denomination | 6c on 5c |
| Color | olive brown |
| Variety | Ovpt. OTTAWA Conf. |
| DateIssued | 07/12/32 |
| Perforation | 11 |
| Printer | Engr. |
| Watermark | Unwmk. |
| Series | |
| Paper | |
| Value: | eBay 'Sold' Values |
|
|
|
| Catalog Number | C4 |
| Description | Mercury and Western Hemisphere |
| Denomination | 6c on 5c |
| Color | olive brown |
| Variety | Ovpt. OTTAWA Conf. |
| DateIssued | 07/12/32 |
| Perforation | 11 |
| Printer | Engr. |
| Watermark | Unwmk. |
| Series | |
| Paper | |
| Value: | eBay 'Sold' Values |