This is Eastman 5222 “Double-X” Cinema B&W film. It does not have Remjet on it, but is meant to be used in Motion Picture Cameras.
The opening sequence of “Casino Royale” was shot on the stuff–These photos are nowhere near as entertaining.
These are developed in Rodinal 1:25.
This film may well unseat Pan F+ as my new favorite B&W film.
Thanks Greg Beatty for the great find!