This is a post war Gasplane that was used by the Bundeswehr.
There are lots of differences between this and genuine World War 2 Gasplane. The most noticeable being the veins that run throughout the material, quite unlike any known World War 2 examples. The metal disks on the corner are another feature not seen on wartime era Gasplanes.
You may also encounter these stamped with fake eagles, WaA codes etc.