Hi, I was having a clear out and found what I believe to be a rifle cartridge, I discovered it buried deep in the ground around 1980 in the Bermondsey area of London. I was wondering if anyone could shed any light on its identity. The markings on the bottom, although hard to read I think say: (top) IART DE or F (bottom) IVIS.R, the number 1 on the left and 11 on the right. It stands around 7.5cm tall and base is around 1.5cm.
Any help would be most appreciated.