Meaning of BYF...?

Could someone let me know if BYF is an acronym for something in German ?


I did a "search" on previous threads back 1 year, and found out it is a Mauser manuufacturing code, but does it stand for anything ? My luger books by Davis and Walters don't define it, either.


I assume BYF does not mean "by your fuehrer"...;>