Unopened Old Can Pure Maple Syrup

Another find that was late father-in-laws. The one gallon can seems to be in decent shape, considering it is still full, not sure what year it is from. I can find nothing on the can itself to date it. The one side has my husbands uncles' name on it from Cuba, NY with a price of $3.95 either penciled in or scratched on. Sure was cheap as today an 8.5 fluid ounce in the commissary is $4.59! The same side even tells you how to keep it pure should it ferment or get mold. Do I dare open it and see? ;-) I think I will just enjoy it for what it is unopened. Now let's all get some pancakes and enjoy the syrup and maybe some maple sugar on the side.