Retroradio, I have not given up yet. I am talking to my CW buddies and asking them to show their CW buddies these pictures to see if this key can be positively identified. Could I trouble you one more time and ask for two more pictures?
1. Overhead shot looking straight down onto the key and possibly using a flash to better illuminate.
2. Underside shot looking straight up at the bottom of the key and possibly using a flash to better illuminate.
Where does the stamped name of "France" appear on the key? Is it stamped into the metal or Bakelite or is it stamped using ink and in what color?
Finally, have you tried contacting any of the Telegraph Key Museums that are found online?
I still hope to find somebody or some website that can identify the key for you.
Dave