Serrated Buttons

I acquired these two interesting corkscrews recently. The one on the left came from Ebay while the one on the right came from a very obscure source, from which I've only purchased one other corkscrew in a 10+ year period. The one on the left looks to be from England while the right corkscrew is unmistakably American. The left example has a beautiful bulbus diamond cut shank and serrated button.

I initially thought that the right example was a rare example of an R. Murphy Boston corkscrew due to the shape and size of the button. After doing a little research I realised that the only similar example I could find was a boars tusk handled corkscrew sold by Robert Leopardi. His version was hallmarked for Simon Bros whereas mine is simply marked Sterling. When looking at examples of R. Murphy Boston corkscrews, they rarely use materials such as stag horn, never use Sterling, and are almost always marked on the shank. This corkscrew breaks all of those rules, as does Leopardi's version. If anyone has any more information on this mystery corkscrew then feel free to chime in.

Lots of exciting new finds in transit. Check back soon.