| ID | 1637 |
| Thumbnail | |
| Cat Number | 1759 |
| Variety | v |
| Description | Viking Missions to Mars |
| Series | Commemoratives 1976-79 |
| Denomination | 15ยข |
| Color | Multicolored |
| Separation Method | PF |
| Extent Perf Die Cut | 4 |
| HPerf | 11.00 |
| VPerf | 11.00 |
| Tagging | Overall |
| Tagging Color | |
| Paper Type | DF |
| Adhesive | WA |
| Gum Type | S |
| Format | S |
| EFO | |
| Watermark | unw. |
| Specialfeatures | paper gray w/luminescent threads under LW |
| Printing Type | Lithographed, engraved (Giori Press) |
| Stamp Date | ---- |
| Printer Engraver | |
| Issue Year | 1978 |
| Image1 | |
| Issue Date | 7/20/1978 |
| Quantity Issued | |
| Visible | Yes |