I will try to do a photo.
I did try at first but it wasn't very clear and I don't want to take it off.
But thanks to everyone. I didn't realise it would end up being such an entertaining post.
Thank you for your replies everyone.
Two threes equals six. Very good.
I just wondered if it was a quirky joke by Gibson. The three is perfectly printed in the knob so there must be others in circulation.
Have good Sunday.
I just noticed that one of the volume knobs on my Les Paul Modern, bought Feb 2021, has odd numbering. The 3 is repeated.
It goes
1 2 3 4 5 3 7 8 9 10
It doesn't bother me. I'm amused. I quite like it.