Test stamp

Test stamps, Dummy stamps or training stamps, are actually labels, used for different purposes.
 * Test/dummy labels are used for testing vending machine equipment to make sure it operates properly. So, these are typically in coil or booklet form.
 * Private vending machine manufacturers made their own labels for the same reason.
 * Training labels are used for schooling postal clerks. Therefore, they can be found "used".
 * This can include labels used to test the qualities of printing presses.

 File:US test coil pair.A.webp|US test coil pair. File:Great Britain poached egg.jpg|British "poached egg" label, used for training. File:Swedish test stamp.jpg|Swedish booklet label, thought to test printing equipment. File:Swedish Miranda 1937.jpg|Swedish "Miranda" test label. It exists in various colors, and despite the date of 1937, was used through the 1970s at least. File:Mail-o-meter test.jpg|US Mail-O-Meter Co. private vending machine test label. 