Just wrote to the owner of the site, attach a photo.
And almost immediately received a reply.
No secrets and tricks.

Apparently, the owner and give you an estimate?
Who does not like it then knows!

Instead it feasible: a white (not shown) Bavarian plate painted and burned later.
sort of a trial work ..
without a signature ..
Strange.

But the picture could not, like a trophy?

rather bowl trophy (or the Germans left) IMHO

No, most of the plate, he said nothing, only defined the brand.