They were used at the local post offices when testing repaired vending machines and at the companies that built the machines. They came in rolls of 100, 500, 3,000, and 10,000. Also testing booklets were prepared using these same testing stamps for the same purposes when testing booklet vending machines.
Disclaimer: While a tremendous amount of effort goes into ensuring the accuracy of the information contained in this site, Stamp Community assumes no liability for errors. Copyright 2005 - 2026 Stamp Community Family - All rights reserved worldwide. Use of any images or content on this website without prior written permission of Stamp Community or the original lender is strictly prohibited. Privacy Policy / Terms of UseAdvertise Here