Small Dresden cups

Hi.

I picked these two cups up and am wondering might they be original Dresden ?and if so when they might date too.

Looking at the marks on bottom there seems to be other black stamps or marks over the blue marks.
They measure approx 2 inches high

Thanks for any info

 

It looks like a Hermann Ohme mark, sideways. https://www.porcelainmarksandmore.com/related/silesia/niedersalzbrunn-01/

 

Think i might have found the mark.
Thanks for help

 

Ah, I couldn't remember the name. Glad you found it. But there are 2 marks -- something black on top of Donath's.

 

Yea i know is that usual to have one mark on top of another i wonder.

 

Seems it was a question in another thread -- could be a retailer's mark, or the mark of another factory that had a hand in the finished product. Dunno for sure.