| Event | SE |
|---|---|
| Narrative | BALPEX / American Revenue Society Postmark #1: Hunt Valley, MD — 2010-09-04 Stamp: Kate Smith (Scott #4463) |
| Cachet Sponsor | GWMSC |
| Design | Pictorial |
| Scott # | 4463 |
| Stock # | G-10-003a |
| Postmark Type | Special |
| Location | Hunt Valley, MD |
| Owner | GWMSC |