I know of several real ones but a picture will not help, like I said side by side a fake and a real one are almost indistinquishable! Even Graham has to go by his lables, a bad fake is easy to tell, the angles are wrong etc, the only reference i know is Grahams book the Spirit of the Pike which has excellent pictures and lots of too look out fors. It isnt on line, but a good library shoudl be able to get a loan copy i should think or you can buy a copy
There is a fake one on my web site, if that will help
The biggest problem is that apparentley most were sent to Canadathat were not destroyed, like I said Canadian provenence will help, a friend of mine bought one from Canda last year off Ebay went cheap but all the signs are that it is probably real, but ??????????????????