Mammoth Cave, longest cave
- Scott Number4068Issued On2006-05-27SeriesWonders of AmericaSize25 x 40 mmPrintingPhotogravureGumSelf-AdhesiveFace Value39 ¢ - United States centFormatStampEmissionCommemorative
Stamp Information
| Field | Value |
|---|---|
| Scott Number | 4068 |
| Face Value | 39 ¢ - United States cent |
| Issued On | 2006-05-27 |
| Series | Wonders of America |
| Printing | Photogravure |
| Size | 25 x 40 mm |
| Gum | Self-Adhesive |
| Format | Stamp |
| Emission | Commemorative |