I purchased some miniature crystal figurines I thought to be Swarovski's, found a stencil style "s" stamp?

on them looking under a magnifying gl instead of the Swarovski Swan trademark. Can anyone tell me what these are? I don't know this trademark and can't find any info on the internet either. What value do they have if any? I'm deciding if I need to return them. I bought them from a second hand store.