What are those unusual wavy lines on your stamps?: Stamp Collecting Basics – Linn’s Stamp News
Linn’s Stamp News |
What are those unusual wavy lines on your stamps?: Stamp Collecting Basics
Linn’s Stamp News Unused postage stamps are considered to be “accountable paper,” defined by the United States Postal Service as “Paper in a postal facility that holds monetary value and must be accounted for, including postage stock,” along with a short list of other … |
More: continued here