I don't know how old this is, but it has that farmhouse green handle and the age marks and flaws in the head make me think this is may be from somewhere around the 1930's.
As I mentioned the head does have some cracking and flaws, but looks to be fully intact.
It is roughly 12 3/4 inches long (including the handle). The head is roughly 2 1/4 x 2 1/4 x 3 3/4 inches.
