I am no expert but I know from some reading on the coin op collectors forum that these are about the most imitated not original old slots.
You can you go on the website and post this and get great feedback.
Very knowledgeable people and very willing to help.

http://www.coinopcollectorforum.com/

AlanB's eBay
http://www.ebay.com/sch/alanb/m.html?hash=item3a775fc2df&item=251110867679&pt=LH_DefaultDomain_0&rt=nc&_trksid=p4340.l2562