The 5 cm M19 mortar of Panzerwerk is relatively well preserved. I should say relatively, because in almost all mortar turrets in the Oder-Warthe-Bogen there is nothing left of the weapon itself. The M19 mortar had a rate of fire of maximum 120 rounds per minute, but this came with the price of a complicated mechanism. In fact the breech was fixed while the barrel was moved to load the mortar bombs.