Gordon Moat
Established
This was what I had in mind - I tried putting my camera on T and I was unsure exactly which bit I would be aiming to lube. I'm guessing the outside of the ring?
Regardless - as stated above, I'm thinking of using it as is for a while and seeing how things go before doing anything drastic.
Use the finger wheel to move focus to minimum distance. Looking through the back, you should see some brass, that’s the helical. The watch oil goes on the edge of the helical, between the black area and the brass. After that, you move the focus all the way through the range with the finger wheel. Start with a few drops placed around the helical, because you can always add more after working the focus through the full range.