Can anyone ID this .50 BMG, 12.7x99, caliber cartridge case? Already checked with Bill W.
Seller couldn’t provide any info. Case is fired, further complicating ID.
It appears to have, originally, been a St Louis 1943 manufactured case, but has been modified as illustrated. It may have been some kind of blank in that it appears to have the case neck roll crimp similar to the M1 Red Topwad blank. It also has either been acid washed, copper plated, or painted with some sort of gold finish similar to those EOD blanks with the wire pig tail.
The original case has been drilled out and a new, smaller, tan plastic case with silver primer inserted in the new opening, ala’ the 9mm SMAW cartridge case design. There are no case markings beyond the old and new headstamps.