Looks like a German prototype for a radar-assisted flak gun was completed late in the war that married a radar to a Flakvierling 38 gun. I guess this thing worked pretty well but just didn't make it to the front before the war ended but since this is Weird WWII have at it! Below are some rough rules for its use in you games of Battleground WWWII.
Notes: Treat as a normal Flakvierling 38 with the additional rules noted below.
Date Introduced: Mid '45
Crew: 8 (commander, gunner, radar op., 5 loaders)
To Hit: Treat all ground and low level targets as normal but any high-flying targets will be hit on a 8 or less. Follow the normal rules for AA Fire against any aerial targets as normal.
Captured Use: Because of its advanced design, any troops not trained with this weapons before the battle began will suffer the normal Captured Use and Unqualified modifiers with an additional +3 to each.
Wargaming Piece: Although there is no dedicated model of this, it wouldn't be to hard to do up a conversion off the numerous Flakvierling 38 kits out on the market. If you do one up be sure to let us know so we can take a look at it.