We suspect that there are other clocks out there but, thus far, the only one we have found is at the Smithsonian's National Museum of American History. However, it is not on display. We have examined pictures of it and while it is very similar to the one in our collection, it is not identical. If you know of any other Time of Flight clocks by Ford, please contact us or leave a message.
For more information, click on the link(s) below. Time of Flight Clock in the Smithsonian
If you know the location of any other of these, please let us know by contacting us at info@EarlyComputers.com.