Vintage Mexican Abalone order Pin/Pendant

Well crafted, this vintage Mexican sterling pin or pendant is 2-1/4" in circumference. The front inlaid design is very smooth with no nicks or chips in the shell. Marked Sterling, 925, Hencho en Mexico, and an eagle essay stamp that is blurred. Pin mechanism works well and has a order small bale for a chain. 18.8 gram weight. In excellent vintage condition for its' age.