Common instruments included violin (fiddle), two types of guitars, recorders and transverse flutes, drums, banjos; harpsichords and hammered dulcimers were less common. Few pianos before 1800. Nearly all imported, certain instruments
were appropriate for men, for women, for the wealthy or less wealthy, for whites or African-Americans.
<font size="2" face="Verdana, Helvetica, sans-serif">http://www.colonialmusic.org/Resource/StudyMD.htm

This site has a not so good picture of a colonial guitar

That doesn't entirely answer your question but it might help a little.