Cossor Oscillograph model 1039M
I recently (2018) brought this out of hibernation and it woke up nicely as can seen from the attached picture. It came with a bunch of other items I purchased at an auction back in 2004. It did not have a mains lead so I removed the socket and wired it directly to a new lead with 13A plug. I’m not sure after all this time but I think I replaced one capacitor. I found instructions somewhere on the internet and printed them out and bound into a little booklet.