If you get a copy of the magnificent book by Konrad Knirim it shows their use in aircraft up to the 60’s ( Lynx, Vulcan, Phantom etc.).

http://www.knirim.de/english.htm

Thank you for that suggestion. I had contacted Konrad some months ago and unfortunately he had not come across this particular clock. My own belief, which stands to be corrected, is that the clock probably was not a commercial success, especially when one considers that the cardboard volvelle version could readily provide the same information – I have come across the volvelle among flight accessories.