| ID | 8617 |
| Thumbnail | |
| Cat Number | C79b |
| Variety | |
| Description | Winged Airmail Envelope |
| Series | Airmail |
| Denomination | 11ยข |
| Color | Carmine |
| Separation Method | PF |
| Extent Perf Die Cut | |
| HPerf | 11.00 |
| VPerf | 10.50 |
| Tagging | Untagged BPC |
| Tagging Color | |
| Paper Type | |
| Adhesive | WA |
| Gum Type | S |
| Format | B |
| EFO | |
| Watermark | unw. |
| Specialfeatures | Congressional issue; precancel "WASHINGTON D. C." |
| Printing Type | Rotary Press |
| Stamp Date | ---- |
| Printer Engraver | |
| Issue Year | 1973 |
| Image1 | |
| Issue Date | 11/16/1973 |
| Quantity Issued | |
| Visible | Yes |