Marks of Rosenthal factories

Sinc 1957 on Rosenthal porcelain marks have been marked different factories.

Landstuhl	Four dots under a word GERMANY	_____________________
Kronach	Three dots under a word GERMANY
Plössberg	Two dots under a word GERMANY
Selb-GA	Single dot under a word GERMANY
SELB-KA	A Single slash under a word GERMANY
Thomas am Kulm	Three slashes under a word GERMANY
Waldershof	No additional mark