the list of TPO's (including drawings of numerous known types and subtypes + ratings for each) is included in the book "Russian Railway Postmarks" by Kiryushkin and Robinson (published by Barefoot). A truly excellent and necessary book!
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