Betty

http://s257.photobucket.com/albums/hh205/bettyc3380/

Can someone look at the above piece of artwork? It is approx. 9 1/8 X 7 3/4 inches (including the white border). I have always assumed this is a print. Now I am not so sure. The paper that it is on is thick. In appears to me that perhaps there is a backing paper that was applied to the print. The details on this are so precise. There are many little figures doing different tasks associated with the operation of the ship. My purpose in trying to identify it is that I need to know if it is worth money. I don't know where to begin to research it and I can't afford an expensive appraisal. I have always enjoyed the print but when I saw a similar one on Antique Roadshow I was surprised. It was given to me about 40 years ago. A friend of mine worked at a local institution and pulled it out of the trash when the building was being evacuated. Beyond that I don't know where it came from. Thanks for looking.