On January 5, 2018, Rolexmagazine.com published an interesting take on Perezcope/Jose Pereztroika
https://www.rolexmagazine.com/2009/01/the-perezcope-effect-there-is-new.html
"On Jake's Rolex World and Jake's Panerai World, we specialize in telling accurate historical stories as well as busting falsely perpetuated myths. Jose Pereztroika is a member of Jake's Rolex World team, and he specializes in separating-fact-from-fiction in the horological world. Jose Pereztroika is what I refer to as a Horological Forensics Investigator. Jose Pereztroika has eagle eyes and pays a TREMENDOUS amount of attention to detail. Jose is the real deal..."
https://www.rolexmagazine.com/2009/01/the-perezcope-effect-there-is-new.html
To learn more about the research of Jose Pereztroika/Perezcope, please visit his website: https://perezcope.com/