cm FlaK 40 heavy anti-aircraft gun, one of the effective weapons of its type during WWII. Used to counter enemy bomber raids. Outcome of fighters and bombers being shot down by this created better armor designs for future planes.
cm FlaK 40 Zwilling, Twin mounted anti-aircraft, capable of firing 20 rounds per minute. Used mainly on flak towers. Production started in 1942 with 10 twin sets produced, another eight in 1943 and in February 1945 a total of 34 were available
German ferry artillery support 'Siebel", at anchor carrying four 88 mm Flak 36 anti-aircraft and two 20 mm FlaK 38 anti-aircraft guns. Used in coastal waters, the Siebel ferry could carry heavy firepower.