| Event | FDC |
|---|---|
| Narrative | George Washington Praying, Green Envelope Postmark #1: Valley Forge, PA — 1977-10-21 Stamp: Washington at Valley Forge, 13 cents (Scott #1729) |
| Cachet Sponsor | GWMSC |
| Design | Pictorial |
| Scott # | 1729 |
| Stock # | G-77-009 |
| Postmark Type | FDC |
| Location | Valley Forge, PA |
| Owner | GWMSC |