I'm looking for some information on a shell I was left by my great uncle when he passed away in 2001, see picture attached. It's rather large (see my foot also in photo) heavy and its marked with 1943 which would tally with my Uncle's story of it being from World War 2. It has a number of markings on it, on the base, See these pics.. I firstly want to know what it's from? Is it live? It appears to have no drill holes and still looks like it has a pin in the base. What is its value? Can you help?