Antiaircraft or Anti-tank Artillery Projectile

This item is a discarded artillery shell, likely from a 37mm or similar small-caliber autocannon or anti-tank gun, dating from the mid-20th century (World War II era). The object consists of a brass cartridge case and a steel projectile (warhead). The brass casing exhibits a heavy, darkened patina and significant surface oxidation typical for its age. The projectile itself appears to be made of solid steel or iron with a blunt, conical nose, showing signs of severe pitting and localized corrosion. Notably, the copper driving band (the ring near the base of the projectile) shows clear 'rifling' marks, which indicate the shell has been fired through a rifled barrel. The presence of these marks, combined with the fact that the projectile is still seated in a casing, suggests this could be a 'reconstructed' relic or, more dangerously, a misfired round (dud) that failed to separate. The overall condition is aged with visible wear, scratches, and a lack of original polished finish. There are no clearly visible maker's marks or stamps in the current photo, though these would typically be found on the base of the brass casing. Caution: Because the projectile is still attached to the casing, it cannot be visually confirmed as inert, posing a significant safety risk until verified by a professional.