| ID | 1918 |
| Thumbnail | |
| Cat Number | 1880a |
| Variety | |
| Description | Bighorn |
| Series | Wildlife of America |
| Denomination | 18ยข |
| Color | Dark Brown |
| Separation Method | PF |
| Extent Perf Die Cut | 4 |
| HPerf | 11.00 |
| VPerf | 11.00 |
| Tagging | Tagging Omitted |
| Tagging Color | |
| Paper Type | |
| Adhesive | WA |
| Gum Type | S |
| Format | B |
| EFO | E |
| Watermark | unw. |
| Specialfeatures | Scott used only listed |
| Printing Type | engraved |
| Stamp Date | ---- |
| Printer Engraver | |
| Issue Year | 1981 |
| Image1 | |
| Issue Date | 5/14/1981 |
| Quantity Issued | |
| Visible | Yes |