Small Tiffany heart and key pendant

Beautiful 1000% authentic heart and key pendant by Tiffany and Co. The key is rubedo and originally was on a medium sized heart tag but I prefer the small size so I had them service it to swap them out and make the chain adjustable 16”-18” as well. Truly a OOAK piece! All stamping and hallmarks present as well. Coming from my personal collection so no box, but will ship in pouch. Recently polished so very faint marks from the buffing. Priced accordingly. Reasonable offers welcome but please no lowballing balling. All silver medium size retails for $325.