For Belgium, I believe that the cancellation originated from office #5. Because it is a large city, there were and are several post offices within it and, this was one way to identify where it was sent from.
They are not particularly rare and normally sell for a few dollars. I have some of these stamps on cover in my collection as well.
Thanks for posting these. It's often interesting what you find on the back.
That's a nice clear Brunswick arrival mark. It didn't take long to get there! The arrival is between 11am and 12 noon the day after it was sent from Paris.
The other cover also has a Swiss railway "travelling post office" AMBULANT postmark.
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