| Year of Issue | 1991 |
|---|---|
| Certification | Uncertified |
| Quality | Mint |
| Grade | Ungraded |
| Denomination | 29 Cent |
| Place of Origin | United States |
Check the listing for details. US Sc. #U621 USPS advertising/specimen stamped envelopes (2), entire, nice. Listed at 2.00 USD. They are the 6-3/4 and 10 sizes.