Regina Delfts Rood

Hi everyone, I am a newbie at this so be patient with me. ;-)
I was in Germany recently and purchased these at a thrift store, they looked very interesting to me and a little vintage. I only paid 2 euros for each (4 euros) and could not pass up. I have been looking online everywhere and not much info on these are found. Plenty of info on the co. Regina, etc. and the blue delfts but not much on the red version of plates, so not sure if I have really made a good find, maybe better than I thought? Well I am throwing this out there maybe some of you in the past have come across some of these and can give more light. Thanks for anything, I am glad to be on here as I have more to share as time goes on with my new found hobby.. Happy hunting..