| ID | 10668 |
| Thumbnail | |
| Cat Number | 1868a |
| Variety | uf4 |
| Description | Lillian M. Gilbreth, Industrial Engineer |
| Series | Great Americans |
| Denomination | 40ยข |
| Color | Dark Green |
| Separation Method | PF |
| Extent Perf Die Cut | 4 |
| HPerf | 11.20 |
| VPerf | 11.20 |
| Tagging | Large Block |
| Tagging Color | Solid Green |
| Paper Type | DF |
| Adhesive | WA |
| Gum Type | D |
| Format | S |
| EFO | F |
| Watermark | unw. |
| Specialfeatures | Bullseye perforation; block tag shifted left with blob of tagging at top |
| Printing Type | engraved |
| Stamp Date | ---- |
| Printer Engraver | |
| Issue Year | 1984 |
| Image1 | |
| Issue Date | 2/24/1984 |
| Quantity Issued | |
| Visible | Yes |