'Savings Stamps' is a general philatelic category that includes four slightly different types of stamps issued at different times by either the U.S. Post Office Department or the U.S. Treasury Department. Their common feature was that they all effectively acted as a means for ordinary citizens to save and/or invest incrementally, a little bit at a time. At the same time, the investments effectively were loans to the federal government.
The four types of Savings Stamps are Postal Savings Stamps (issued from 1911-1941) and Savings Stamps (1954-1961), both issued by the Post Office Department; and War Savings Stamps (1917-1945) and a Treasury Savings Stamp (1920), both issued by the Treasury Department.
Issued in 10-cent to $5.00 denominations, Postal Savings Stamps were redeemable in the form of credits to postal savings accounts. The postal savings system was discontinued March 28, 1966.
Savings Stamps, also issued in 10-cent to $5.00 denominations, are the savings stamps most familiar to older philatelists, who might remember buying these stamps at school and placing them in booklets. When full, the booklets were redeemable in the form of United States savings bonds. Sale of Savings Stamps was discontinued June 30, 1970.
Issued in 25-cent and $5 denominations (1917-20) and 10-cent to $5.00 denominations (1942-1945), War Savings Stamps were redeemable in the form of United States treasury war certificates, defense bonds, or war bonds.
One Treasury Savings Stamp with a $1.00 denomination was issued in 1920. These stamps were redeemable in the form of either war savings stamps or treasury savings certificates.