Sorry, don't remember that one but we look after a Merc G-Wagen 463 1990ish that has a fuse checker alongside the fuseboard - touch the blade type fuse to the contacts and a small bulb lights up. Easy? I still had to show the owner how to work it !!!
This is starting to ring some bells. There was a Cortina (?) built in Australia in the '60s with almost no fuses - perhaps just 2 - lots of electrical fires and meltdowns followed.....