5 Mark 1928-1946 but wrong year [solved]

So i found a 5 Mark today  https://en.numista.com/catalogue/pieces6599.html
But everyone that has looked at agrees with me it says 1918

So is the site wrong or is my coin wrong?
i cannot provide a proper picture because my camera is pretty much potatovison
Best picture i got out of many
http://postimg.org/image/3s5ont6ud/

Maybe it is a different type?

its a pretty uniqe desing so it has to be one of thoose

just solved the mystery its 1948