| Event | FDC |
|---|---|
| Narrative | Isaiah Thomas, Square and Compass Postmark #1: Worshester, MA — 1981-05-05 Stamp: Isaiah Thomas, 12 cents (Scott #UX89) |
| Cachet Sponsor | GWMSC |
| Design | Pictorial |
| Scott # | UX89 |
| Stock # | G-81-004 |
| Postmark Type | FDC |
| Location | Worshester, MA |
| Owner | GWMSC |