This was sold as a Tie Tack, in limited numbers, to raise funds at California Missions. 

This one is marked and wonderful. I've had it for many years.

I'm selling my entire bell collection (real bells, not just pins), and hope this might serve as inspiration to someone; wear it as a lapel pin, for man or woman, or tie tack.

I have another Tie Tack / lapel pin that has a Saphire stone, gold-plated, over Sterling, also by Tiffany, in another listing; however the other one does not show the Tiffany Co. marking. 

Thanks you for looking. Please have a look at my bells, large and small.