Parker Duofold pencil eraser and lead refills?

[penmainiac]

Hi everyone! I used to ignore vintage mechanical pencils as opposed to their fp counterparts, but after recently watching the movie The Jungle Cruise it appears I have been caught with the mechanical pencil bug. They used an 1920s Parker Duofold jade pencil I believe in the film, and after seeing it I wanted one to go with my Duofold Senior fp. So I have managed to score a Jade one off eBay, but does anyone know the type of eraser refill that it fits? In addition, I have already seen others comment that 1.1 lead seems to be the standard for the era so will Retro 51 1.15mm refills work? thanks in advance for any insight that can be shared!