Unfortunately, the Dutch clip does not include the escape itself. However, Joe points out that an archival print in the collection of the UCLA Film Archives does include the full sequence. But UCLA does not allow copying or screen captures, so this is best look we'll get until someone embarks on a proper restoration.
There is another layer of interest here. Houdini invented a diving suit with a quick release mechanism for emergencies. It's said he did so "after word came to him that one of his best friends, a diver in Australia, was lost when his air lines were destroyed." Houdini shared his patent with the U.S. Navy, believing it could save lives. Newspapers at the time noted that the scene in The Master Mystery shows "a practical working demonstration" of Houdini's great invention.
Below are some of the unique title cards that appeared in this Dutch print, along with a newspaper advert from the time. Cinema Context records 23 screenings of "Houdini, de boeienkoning" in The Netherlands from August through October 1920.
Thanks to Arthur Moses, Elif Rongen and Joe Notaro.