I was out with my metal detector and found a broken necklace buried a few inches down under some grass. It is broken but seems to be a non tarnishing silver color metal, with a lot of little keys and a lot of little heart shaped locks all of them different and old fashioned looking. Anyone ever see anything like this? Can't find any type of makers mark. It is longer than a normal necklace I wonder if it is a "chastity belt" Or could it be some style of rosary? Any input?