help required on 1911 byf?

[flyboy]

I’m new to your forum, so hello everyone!
I am trying to find out some info on a 1911 luger that has all original part and matching magazine. The overall condition is excellent. What is confusing me is the markings on the top and side say BYF, what I thought meant it was made in 41, or 42. But the barrel markings say 1911 and the sn from the barrel match all the other parts.
If you look carefully, it looks like the original markings where ground off and BYF stamped over. I am trying to find out some kind of history and value to this gun.
Thanks in advance for any help or direction you can give me. I appreciate anyone willing to share their knowledge.

Flyboy.