Set Sterling Silver

I have a sterling silver necklace that has a stamp on the back SS KY. Does anyone know what this means?
It is a sterling silver and turquoise necklace, the necklace has 5 teardrop or possibly arrowhead shape type turquoise stones set in sterling silver. On the back of the middle stone is stamped SS KY. If anyone knows what this means or if it might be worth money let me know. I was told it is vintage and it came from someone with gobs and gobs of money!! Thanks so much for your help!
it could be the initals of the place you bought it from