Dec-1942 marked 40mm Bofors casing Value?

[Forrest_Gump]

so for a long time now I've owned a 40mm shell and well I look on selling it (after I get the fake round of course)

but if anyone knows what this would be worth please any help would be appreciated and also if you can tell a bit about I t I don't know much other than the little I know about the markings

[Forrest_Gump]

also if your wondering the markings say "12-1942  A.L. (an anchor symbol) LOT 1687 40MM MK .1 (and then a circle with an m with a w on the bottom inside of it)