Here is one more gadget that Bob C. found. This is not a vacuum tube device but I'm pretty sure that you'll like it; it is probably the most unique watch that I've seen. It is a watch that uses belts with numbers painted on them to display the time. Watch the video to see it in action.

[Made by Devonwork via core 77 via Bob C.]

Links

• Youtube Video https://youtu.be/ECkzBJUdGYc
• Backup Youtube Video https://youtu.be/BryTbJK9RNg