which German 88 mm anti-aircraft and anti-tank artillery  was produced by  Spreewerk 
Spreewerk:  Spreewerk produced a number of important weapons and components before and during World War II including 280,880 of the Walther P.38 pistol which was the standard service pistol of the German "Heer", and the famous 8.8 cm Flak anti-aircraft gun. 8.8 cm Flak 18/36/37/41: The 8.8 cm Flak 18/36/37/41 (commonly called the eighty-eight) was a German 88 mm anti-aircraft and anti-tank artillery gun from World War II.
i don't know