By Jupiter!

I thought about this lens (Jupiter-11) a while back. I assumed I must have sold it cos I hadn’t seen it for about a year.
Then today I found it in Isobel’s room whilst looking for an old camera to smash (Yes, I may be going slightly eccentric).
The focus was really stiff. I tried to dismantle it to clean and lube the helicoid.
Two grub screws defeated me. They turned but wouldn’t unscrew. So I squirted some lithium grease where I could and put it back together. It feels smoother.