Help me on a piece of music's art history....


I recently and for reasons not known to me stopped into a small antique store while on vacation.....I saw a poster that caught my eye. It was the billboard poster for the 1972 Watkins Glenn '' Summer Jam'' concert that featured three of my all time favorite artists ; The Grateful Dead, The Allman Brothers Band and The Band....it ended up being larger in population than Woodstock. It is in great to mint shape and I am 98% sure this is not just a recent reproduction but very well could be the first run of this poster. I went on the Internet and saw where the promotor of these bands the late Billy Graham, ( I do believe the site was called Wolfgang Productions ) had one which is probably the original and it was NOT FOR SALE !!! He had other concert posters from ''that era '' for sale on that site. This could be and I am hoping that this is the first run of these posters used for the promation of that concert. I was almost 16 and had my backs packed to go along with my brother and his friends and my mom stopped that from ever happening...NO it is not for sale but does anybody have an idea of it's worth or who would possibly know if this is in fact the real deal....!!!!
garebear
Wolgang's Vault bought the rights and the existing inventory for the BG productions Fillmore series posters. They are monopolistic and own the rights to the visual images to these posters and regularly threaten ebay sellers to cease and desist showing the image of their own posters for sale as a deterrent to competition. Most of the Watkins Glen posters I've seen are 2nd run. They look just like the first run. I would get Eric King's Price Guide or contact Psychedelic Solution in Manhattan to find out how to differentiate the 1st run from the 2nd on this poster.
Jsonic offers solid advice re: validating it. I'm not really sure what to tell you as far as how to tell for sure. If you know of a good printer in your area, one thing they might be able to help with is the age of the stock it's printed on. Circa 1973 card stock would be a pretty reliable indicator. Repro or not - great find! Good job on the NYE poster as well. I recently got my hands on a minty poster from the 1980 run at Radio City Music Hall.....
Congratulations and enjoy!! I happen to be a long time fan of the GD as should be evidenced by my user name.
Slipnot>>> Help's on the Way>>>> Franklin's Tower....and ending with a beautiful Crazy Fingers..... I was wondering about that but I also figured that one out !!!! Thanks again
Serious poster collectors also use a micrometer to measure the width of the paper the poster is printed on. Different print runs often use different width paper.