Hello,
I have gilded porcelain coffee set for two persons.

On the back of cups and cup plates are maker mark. Appears to be the mark in Zehendner & Co. of Tirschenreuth, Bavaria and manufacture year can be 1940 or later. There is also gold textured eagle emblem.

On the back of coffee pot, sugar bowl and milk cup is gold textured eagle emblem only.

The eagle is similar to the 3rd Reich eagle, but also has differences. I do not understand what it means. Please help me to define what means eagle emblem and what coffee set is worth? Thank you.