Help with an 1845 baseball rule pamphlet

[edtiques]

Hi...I recently picked this pamphlet up and was hoping someone might be able to help me out with it.It's 6 pages bound by a single string and called "RULES AND REGULATIONS OF THE RECENTLY INVENTED GAME OF BASE BALL AS ADOPTED BY THE KNICKERBOCKER BASE BALL CLUB ON SEPTEMBER 23,1845".
I've only been able to find one image that was similar:

http://www.19cbaseball.com/image-kni...all-rules.html



My copy is word for word until the last page.The image on the internet identifies it as a reprint,while my last page reads:"This pamphlet was hand-set in CASLON OLDSTYLE TYPE and printed on an 1847 Washington flatbed press at the printing office of The Farmers Museum in Cooperstown,New York".
I can't find anything that identifies my copy as a reprint.I'm hoping someone might know another way of authenticating it.