39m rear lens cap, on the cheap in UK.

[fidget]

If you have a few LTM lenses, you may have a couple without lens caps. I found this and thought it was a good fit. Can be pushed on or screwed on.
It's a bottle top from a cold coffee drink from ALDI, though I guess that there are many that would fit.
If only I could find a cap for the front in the form of a beer bottle cap, now that would be a good research project.

Dave

 

[John Robertson]

Thanks Dave,
Now I have to find someone in the family who will drink the coffee!!!
I hate the stuff in any shape or form, can't even bear the smell.
I will have to do a bit of arm twisting now!!!

 

[fotosniper]

Thanks Fidget..got an Aldi not far from me...not sure about cold coffee though!..beer?.. yea!

 

[fidget]

Maybe a small prize to the RFer who finds a beer cap that fits either the front or the rear. Perhaps a small cache of aspirin? And our gratitude. (I didn't like the coffee either)