Hi ~ welcome to the forums.
You might find the thread below interesting, haven't done any research beyond what is mentioned there, the Rago catalog referenced did not show or describe the mark, so can only guess that perhaps the original poster saw the pieces in person... Suspect the attribution is most likely correct, but they never returned to provide any other information regarding their identification.
viewtopic.php?f=2&t=22728&p=54537&hilit=macy%27s#p54537Could you please post pictures of your set?
~Cheryl