It is a German 88mm A-A Flak round's case. See the website below-it should tell you everything you need, as it shows a near identical case to yours.
3. Ammunition | TM E9-369A: German 88-mm Antiaircraft Gun Materiel - Technical Manual, U.S. War Department, June 29, 1943 (Lone Sentry)
William
"Much that once was, is lost. For none now live who remember it."
Nice early brass 88mm case
Similar Threads
Bookmarks