I've never seen one before. "S & Co", that doesn't exactly give much to go off of in terms of researching. Any idea on whereabouts in the world it's from? That might narrow it down a bit. There were an awful lot of companies with names beginning with S throughout history.
It was most likely dug on the east coast. That's where my parents did most of their digging. Lots of bottles from Maine, New York, Boston....