This is a valuable old 'so-called dollar' medal from the International Exhibition of 1876 in Philadelphia. The circulated, nicely toned example in our picture comes from Goldberg Auctions where it sold for $357 US dollar back in 2007. Medals that are less circulated with good eye appeal would sell for two or three times that amount.
worn: $150 US dollars approximate catalog value
average circulated: $300
well preserved: $500
fully uncirculated: $1000
Only 2526 medals were struck during the Exhibition, and they sold for $1.25 each, a ton of money back then. Congratulations, Arron, on your great coin, and thanks to Goldberg Auctions for use of their photo.
There are similar medals struck in 1976 with the guarded Liberty bell design on the front and a different pattern on the back. These are common and sell for a few dollars.