These are three of twenty-five autographs in a program from a 1947 Warner Brothers event. There are irregularities with each that give me major doubts. The provenance is that it was passed down from a girl who dated "Johnny Barnes" who the signatures are made out to.
I have serious reservations about all three.
I don't know Flynn, but I am fairly familiar with Reagan and Bogart. I wouldn't touch either of them.
the bogart is def no good