R S Prussia & More Schlegelmilch Porcelain Featuring Cobalt
Mary McCaslin and her husband Bob started collecting R. S. Prussia in 1970. Several years later, she decided to write a book on this subject, but since there were several books being published at the time on this subject, she decided to wait awhile. In the interim Mary authored two books on Royal Bayreuth, another German porcelain from the same time period.