Unknown Huge Primer

[Depotman]

Can anyone identify this huge primer? It’s about 165mm long x 71mm base dia. The thread dia is approx. 67 or 68mm. The markings on the primer are “M2B” followed by a ‘dropped’ “g” and “58” preceded by a logo of three overlapping upper case “A”s. Depotman.

 

[pzgr40]

Makes me think of the powdercharge as used in the 90mm low velocity Mecar shells. The tail fitted over this powder charge. I'll see if I can find a picture.
Regards, DJH

 

[orpheus72]

The "Bg" is a typical addittion to the M2 code when made (country specific ?) for Belgian use (see other items like handgrenades M50Bg, etc..)
maker is for sure MECAR (seen the MA initials)
unfortunately i do not have pictures ...