Recently acquired the item below. Am familiar with firearms but have no experience with this type of ordinance.
Would appreciate any help you can offer to identify this item, its purpose, history, and if there is any danger associated with keeping it in the condition shown.
Headstamp (correct term?) contains the following:
W N Y
E.C.P. (anchor symbol) W.McD
Band at top of casing is marked:
R.E.I. (anchor symbol)
Unable to locate any markings on iron projectile.
Thanks for any assistance you can offer.