German China plate with "AR" marking origin

Hello all and Happy New year.

Over the holiday break I was able to locate this piece purchased well over 30 years ago.

Front and rear images will aid you with the German origin and small sticker still fixed to the plate noting what I paid long ago. I am not sure if these type of items loose value (?)  but I am sure I may had paid slightly less during a quick negotiation.

It appears to still be in near mint condition. The plate seating ring on the rear shows only minor pitting do to age, infrequent movement or display.

• Any historical imput about the factory who created this piece I would find interesting to review.
• Any bench-marking pricing appreciated where one can negotiate on another trade for other collectables appreciated.

Thanks everyone:

Ken