I will not be home until tomorrow, I checked them when I listed and I am almost positive the stamo was on because it took me awhile to get my lense to physically read. I believe the stamp is on the rod that goes thru the ear. States 14k. I will be home tomorrow. The only thing I can tell you is if you win and they are not stamped I will allow you to ask for a refund prior to shipment being made.