doctordave

I recently acquired a watercolor at an estate sale, and am seeking help in identifying it's artist.
It's a 14 & 1/2" by 22" painting of a seated woman in a bathing suit. The style of the bathing suit appears to be from the 1940's or 50's
It has the initials RBG in the lower left corner, and is in what appears to be the original frame. (I have not removed it from the frame to inspect it further, and it's got cardboard and brown paper-tape securing it to the frame.) The construction of the frame is also circa 1940's or 50's
I am new to this site, and have not yet learned how to post photos, but will learn if necessary.
Anybody out there who can help?

Dave