I have had this shell in my collection for a number of years now and have never been sure what type it actually is or where it is from. At a guess I would say that it is british with the war department arrow on it and also it is of navy use with the anchor stamped into the bottom. I would appreciate any help. Finally I would like someone to advise me what the White fuzz might be around the plug at the base of the shell (you can see it in the picture). Im hoping that it is nothing but am slightly worried that this may be something serious. I'll just add that it has definitely been fired as there is rifling on the driving band. All help and preferably good news would be greatly received.