Beautifully matted Hampton Classic poster- strange mystery here! Labeled wrong?

This Paul Davis print was used for the 1978 Classic. The ‘81 Classic is yet another print by Richard Mantel (I have that original poster, as we used to attend the show every year.) I have no idea why this print was labeled 1981. The glass broke and I had to open the frame to get pieces out. Small damage from glass pictured. Make an offer as this is a really strange item!!!