The pendant is not stamped. The strand has TIFFANY & CO stamped on it. It was bought as a gift for me at Tiffanys on 57th St in NYC about 20 years ago and came in their signature blue small tied bag with their name logo (which I did not keep). Perhaps their markings are not familiar to you from so long ago. If you are not comfortable with my presentation, then please do not bid. Thanks for your interest.