This is a Vintage 60s Anson Sterling Silver Zodiac Scorpio or Cancer Tie Tack / Small Lapel Pin.
Could be used as a tie tack or you could replace it with a back that does not have a chain to make it a lapel pin.
It measures 1/2" x 1/2".
Very good condition. Marked Anson Sterling on back.
Please see all photos for details. I have another Anson Zodiac Tie tack listed; please take a look!