Nice intrepretation and find Axel E. I bet it took you a bit to pull that rabbit out of the hat. I don't know that anyone stated that the firearms merchant was unknown, but that the name and location was unreadable for the moment. The fact that the slots were cut may indicate that after a firearms merchant received their funds and the business transaction complete, they really didn't care if their name remained on the longarm. They would just move on to the next one. Now I know that some firearms merchants offered a warranty, but I don't know if all did. Who would have thought that 100 years later that the marks would be so scruntinized.
Kind Regards,
Raimey
rse