What is this shell?

The only thing I know is that it's a tank shell from around ww2(sorry for not ideal pictures but i dont own it and i was a guest at the house and when i asked about it nobody seemed to know nor care tbh.) it Is in greece if that helps narrow down things. The inscription on the bottom of the cartridge is: LOT HXP 14 88 40/60 and the big rune which I think is a 4. Thanks in advance for the help!!