| Event | GWB |
|---|---|
| Narrative | Washington on Horseback Postmark #1: Washington, DC — 1974-02-22 Stamp: 50-Star and 13-Star Flags (Scott #1519) |
| Cachet Sponsor | GWMSC |
| Design | Pictorial |
| Scott # | 1519 |
| Stock # | G-74-001 |
| Postmark Type | Std |
| Location | Washington, DC |
| Owner | GWMSC |