| Event | FDC |
|---|---|
| Narrative | Antartic Map Postmark #1: Washington, DC — 1986-05-28 Stamp: Antarcitc Explorers, 22 cents (Block-4) (Scott #2386-2389) |
| Cachet Sponsor | GWMSC |
| Design | Pictorial |
| Scott # | 2386-2389 |
| Stock # | G-88-008 |
| Postmark Type | FDC |
| Location | Washington, DC |
| Owner | GWMSC |