Lammot du Pont (of the DuPont Chemical Company), like many of the rich and famous of the time, had a set of crest & seals made for his yacht, the Marmot. The burgess represent the Corinthian Yacht Club of Philadelphia and the Du Pont family and the Du Pont family. Marmot is the name of his yacht. I haven't found the info yet but I bet Lammot's wife's name begins MAR.

I'm sure there are other colors but since these are the only two I know of, this is my set.
I believe John Benedict found another blue. Maybe also this white?