Found this last weekend, unfortunately it has been trench arted, however, it still retains it's origibal size: 118 x 30.5 mm (this geing the rim diameter) and a caliber which seems to be 20 mm. marking on one cartridge are TC R 10 10 and a French grenade as well as the letter for the metal supplier and the second one says TC APX 8 08.





