Classic pin is 7/8" in diameter. No copyright symbol on the signature cartouche, so probably pre-1955.
Follow the link above for another view.
Dimensional sculpture with great detail. I believe the green stone is jade, but it could be glass. The texture on the trunk is darker than the rest of the pin, and there are a couple . . . .
Beautiful domed pin is 2 1/8" long and 1/2" high. No copyright symbol on the signature cartouche, so probably pre-1955.