I restored this 60s clock but since 2 of the original GN-1 tubes were completely blackened, I replaced the hours and minutes digits with 4 GN-4 tubes.
I wanted to keep as much as possible of the original rare pieces, so I used the two working GN-1 tubes to show the seconds: hence I had to insert two additional stepping switches.
The seconds pulse comes from a wheel mounted on the same shaft of the original motor pulsing the minutes.
see new video for reworking: https://youtu.be/3FysV4ifS68
