The guy did list it on eBay and I bought it. It's sweet. It'll go perfect in my crew cab cummins I'm building. It does have the pentastar logo on the back and both the tach and bezel have indexing marks on them so the tach is orientated correctly.
http://www.ebay.com/itm/NOS-MOPAR-1973-6...221293576918%26
This is an NOS one on eBay