I assumed it was the Dallmeyer "layout" for their RR - but I didn't have a copy of their long-lived engraving style around to confirm it 100%. The inclusion of "PATENT" suggested that someone has the real article in front of them.
Perhaps the real Dallmeyer 39901 is also a RR? But I don't know is Sean (the guardian of the Dallmeyer ledgers) is interested in Dallmeyer copies - but he might be able to confirm?
Tom, I hope you find some of this interesting! It is likely to be good performer and, if you are thinking about selling, there is always interest in a professional forgery/misrepresentation of an innovative lens design.
Bookmarks