Old man had a ton of these and other misc. Ammunition. All live ammo coming from a veterans estate sale.
This giant round is marked with the letter p at. A star and 37,along with a waffenanpt stamp
The projectile is marked 40/2
Also the projectile is faintly marked with an eagle over symbol and Wa.A.732 'under the eagle and swastika.
Also the part of projectile that is not coated grey has the numbers 509 under eagle as well. It also comes in its original hard cardboard tube.
Can anyone tell me what type of round this is and what kind of weapons it may have been used in ?