Just took a walk down by the local beach and found this cartridge. It's 5.3 cm in total length and the back measures 1.2 cm in diameter.
There's a hole that's drilled all the way through right above the base, I figure that's got something to do with this having been made inert before dumping in the sea. On the back I can barely make out "AT" or "AF"... could it be "RAF"? Not sure.... most of the stuff down by the beach should be Luftwaffe or Heer, so...
Any help would be appreciated.
Only shot I had time to upload before battery went dead... I'm charging the battery now and will add more asap: