Goebel Back Bar Statue Design Drawing

I believe this to be a design drawing from around 1960 (?) for a Goebel Back Bar Statue. I've owned this piece for approximately 20 years after picking it up at an antique store. It is 12.5" x 14" and has dimensions and manufacturing details written all over it. At the top it has "Sketch #3416." The drawing, which I believe is done in colored pencil or chalk, also calls for production of 20,000 units. It does have some paper damage (acid?) at the bottom, but it has been that way since I purchased it.

I have never seen another piece like this, and was curious if there are others out there. Also, if anyone believes this to be worthy of conservation to prevent any more damage.