Hi John. Yes, all of the B areas of Boston are contiguous - they form the main part of western Boston. But I do agree that if there are not other letters known to cover the rest of Boston that it would be less likely.
Another possibility is it could be the initials of the carrier - something like the Boston Delivery Company?
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