My Screwback - HELP !!!

[RODSCOTT77]

Please, help !!! What is it ? - Screwback from a Iron Cross 1st Class ? manufactured by ....... ?
There are brands: the mermaid (undine,siren), a lion with one or two tails, the horseman with a board. On a board a letter "B". More to the right below - small swastika, three crowns or flowers ???. More to the left below may be LDO Maker "L/10" - Deschler & Sohn, München ???

Photo I apply:

[Chopperman]

Maybe it's just my old tired eyes, but I'm not seeing any marks.
I have not seen any original screwback plates with any of the marks that you mentioned.
Typically they would only be marked with a silver content stamp (500, 800 or 925) or
the DRGM patent mark. One of the only manufactures to add it's logo would be Meybauer.

Here is a link to a site that shows Imperial German silver marks.

German Hallmarks - Encyclopedia of Silver Marks, Hallmarks & Makers' Marks

[RODSCOTT77]

Thanks Chopperman !!!