Posted By:
warshawlawBraddock had many card preceding this 1935 British issue, including a 1928 Exhibit which is the earliest one I know of.
As far as the movie goes, beats me.
Edited to Add:
and no, his win was not a frame-up (fix). Baer broke his right hand in training shortly before the fight but kept it secret to avoid a monetary penalty for pulling out.