[Guest]

I HAVE A SHOOTER GRADE 1916 DWM ALL MATCHING SERIAL NUMBERED LUGER
SERIAL NUMBER 8396 AND AM CURIOUS ABOUT MARKINGS UNDER THE BARREL.
BENEATH THE SERIAL NUMBER IS 8.82 THEN A CENTERING LINE PAST THE BARREL THREADS FOLLOWED BY A LETTER C THEN BY THE BARREL LUG A, O ON
THE LEFT SIDE A, J ON THE RIGHT SIDE AND A L ON THE BACK SIDE OF THE LUG. DOES ANYBODY KNOW WHAT THEY MEAN

 

[RockinWR]

UTony,
* 8,82 = 8.82mm which is the actual bore diameter measured land to opposing land when new.
* The "Centering Line" is likely the barrel to receiver "witness" mark. You can do a search on this term to find a generous thread discussing this mark and its implications.
* The letters C, O, J, & L are thought to be DWM worker acceptance stamps for various tasks they were assigned.
* Hope this helps.