This is an injection-plastic military vehicle model kit.
The proposed E-series of Entwicklung (developmental) tanks was Germany's attempt at creating a standardized line of armored fighting vehicles that would incorporate interchangeable parts. There were to be six weight classes, designated E-5, E-10, E-25, E-50, E-75, and E-100. Only the E-100 ever got off the drawing boards, and even then it only made it so far as a turretless, engineless chassis and suspension. There are rumors that three E-25 hulls were manufactured, but they have never been documented. This E-50 Flakpanzer version is entirely fictional (and very cool!), although a prototype of the turret was rumored to have been built in January of 1945.
Like the E-50 version, the E-75 Flakpanzer was to mount twin 5.5cm anti-aircraft guns in a fully rotating turret.
Trumpeter's E-75 Flakpanzer kit is sharply molded in light gray plastic, and features flexible belt-style tracks. Comes with a nice fret of photo-etched metal detail parts, braided metal wire for the tow cables, and a painting chart for a fictitious operational vehicle. No markings are included (none needed!). Another great "what-if" project from Trumpeter!