| ID | 1921 |
| Thumbnail | |
| Cat Number | 1883 |
| Variety | |
| Description | American Buffalo |
| Series | Wildlife of America |
| Denomination | 18ยข |
| Color | Dark Brown |
| Separation Method | PF |
| Extent Perf Die Cut | 2,3 |
| HPerf | 11.00 |
| VPerf | 11.00 |
| Tagging | Overall |
| Tagging Color | |
| Paper Type | |
| Adhesive | WA |
| Gum Type | S |
| Format | B |
| EFO | |
| Watermark | unw. |
| Specialfeatures | |
| Printing Type | engraved |
| Stamp Date | ---- |
| Printer Engraver | |
| Issue Year | 1981 |
| Image1 | |
| Issue Date | 5/14/1981 |
| Quantity Issued | |
| Visible | Yes |