Thank you very much for sharing this information. Hopefully this can make its way to a future Chan release as an "extra." And, WHAT an extra that would be!
I don't know if you recall the person from your country who claimed to have had a video copy, or a partial one, dubbed into French, of "Charlie Chan's Chance." A friend supposedly held the original. At the time his story had a the ring of being the truth. Of course, nothing ever came of this, but wouldn't that be something, as well? If it had been a total hoax, he did some pretty good research to make it sound real!