Having discovered a way to combine Quicktime movies for my 13 second Grim Game assemblage, I've now gathered together several trims of what is Houdini's only filmed overboard box escape (to my knowledge) to give us the full event in 01:37. These clips come from The Learning Channel's 1999 documentary, The Greatest, the 1971 BBC documentary, The Truth About Houdini, and The Houdini Code (2008).
Enjoy the show.
UPDATE: This is confirmed to be Harry Kellar. The man standing next to Kellar who also shakes Houdini's hand is magician Nate Leipzig. But the time and location of this stunt remains a mystery.