Hi,
I hope someone can help me with some info!!  I was out riding in our pasture the other day and noticed something stuck in the trees.  Upon closer inspection i found it to be a very very old Oliver Chilled Plow co. horse-drawn implement. I believe it might be a rake, not sure though.  I am not a tractor expert. It is very large, about as wide as my ford expedition is long. Could someone please tell me how to go about finding out how old this is?  And what value it has if any.  I am going to have to cut down the trees to actually get to it.  The trees have grown up around it to the point that it is hard to get close to it. I appreciate any and all comments.

Thanks