The thing about Massachusetts tree coins there are so many different dies they were cast on, so with out a definitive tree it can be a little tougher. I saw the in 1652 the bottom of the five is closer to the six underlined in red, The X has one cross that is fat and one skinny fat on circled in orange, and you can partially make out a branch of an oak tree circled in blue. I could be wrong, like I said there were many variations of the tree coins. BTW awesome find, I know people detecting for 30+ years that have not found one. Such a bucket list coin. Are you going to get it appraised? Rare ones of can be worth $70,000 +. I know it has been shaved but can you tell the rough size of this coin?