Freedom - Emancipation Proclamation Sheet of 20 Forever Stamps Scott 4721 By USPS Sheet of 20 New Forever Stamps Stamps prominently feature the phrase, Henceforward Shall Be Free" Stamps note Abraham Lincolns name and the year the Emancipation Proclamation was signed Forever stamps are always valid with USPS for first class, one-ounce postage Brand new USPS stamps, no longer available for sale in post offices