My mom's vintage or antique cup and saucer

Hello!
I found the teacup, saucer, and plates my mother bought.
I thought the green color with a floral print was special, so I was curious about this product. Because there is no information on the bottom. Unmarked. It is very light and looks vintage or antique.
I initially thought of the British Paragon porcelain or something else, but also thought it might be a German Bavarian procelain.
It would be great if anyone has information about these tea cup and saucer and plates with regards to their age.
Thanks for your help.