DE
I was under the impression that NODD was actually the name of the apparatus of which the globe, clock, schools dots and various breakdown captions were parts. I have a photo somewhere of a complete NODD camera, lights and all the globes in front of it...! I'll see if I can upload it to metropol and share it with y'all. There was also a BIGEARS - which was a slide scanner.
The colour was added to black/white images (moving or still) through a device known as the "Cox Box". Invented by a Mr Cox by all accounts. AIUI it had rotary dials for Red Green and Blue for both whites and blacks: hence a black/white image could be coloured to any combination of two colours. Although I suspect there were standard colours for the globe and clock (even if that was by means of chinagraph marks alongside the pots) it might account for the seemingly wide range of blue/yellow employed over the years.
The colour was added to black/white images (moving or still) through a device known as the "Cox Box". Invented by a Mr Cox by all accounts. AIUI it had rotary dials for Red Green and Blue for both whites and blacks: hence a black/white image could be coloured to any combination of two colours. Although I suspect there were standard colours for the globe and clock (even if that was by means of chinagraph marks alongside the pots) it might account for the seemingly wide range of blue/yellow employed over the years.