So I'm stumped. We are renovating a 1906 Craftsman-inspired house that needs some serious TLC but has good bones. It has glass egg shaped doorknobs on many of the doors - I think they add character, my husband dislikes them. The knobs are large with very plain glass (smooth, not cut) and a plain rosette. I'd like to find more of them to figure out if they are most likely original to the house or if they were more likely added later, but I can't find anything similar anywhere. Has anyone seen knobs like this before? I've tried eBay, Historic House Parts, Look in the Attic, and a lot of the architectural salvage places to no avail. Any information would be appreciated!