Lots of info on Google - try Robert Lyn Nelson discussion boards or forums.

Hi I am giving my original post a bump, I had no success on other sites. I have a Robert L. Nelson lithograph. It was framed, 26x34 inches and looks to have been signed in silver pen(?) from 1981. It is not numbered and does not have a marine life sketch next to signature. I cant seem to find one like it: its on a thick poster board type material and under the picture it says "Robert L. Nelson" in 1 1/2" gold letters with black outline (very 80's) and to the right side next to it in smaller letters says "MAUI DAYBREAK" and under that "GALLERY HAWAII"

http://s109.photobucket.com/user/c-130load/media/Nelson/20140916_155057_zps64f91c1d.jpg.html?sort=3&o=2