I found this while sorting through and identifying some cartridges for someone I know who isn’t on the forum.
The round is in very bad condition, there is a hole in the side of the case, and one side of the neck is full of cracks.
The measurements of this round are:
Bullet 8.3mm, case length 52mm, rim diameter 13.38mm
The headstamp was weakly struck, and may have been polished as well so it’s difficult to read.
At 12 O’Clock I can make out: A???AU, at 3 O’Clock: 93, and ??2 at 6 O’Clock.
Thanks for any info.