Vintage pinback pin, I'VE SIGNED MFA, early 1920's one, in n-mint unused new old stock condition. Couple of spots. Size is 3/4" round. Pictures show the front, back is embossed with makers mark. NOTE: All of the advertising items I have listed are guaranteed to be 100% authentic originals. They are all clean and ready for display. Thank you for your purchase I appreciate it.