Hi,
When I got my 85mm it came with a generic no-name LTM - M adapter. It was abused and slightly stripped (probably from someone trying to take it off wrong).
It would keep the lens on the camera but it would sometimes allow it to rotate and come off. I was cheap and broke. The lens was over $1000. and I didn't feel like investing more money into it, so I lived with it a while. When it fell off, but I caught it before it smashed into the ground, I decided to stop messing around with 'saving money' and get a proper Leitz adapter.
It's been working perfectly and safely ever since.
I don't know if Voigtländer was making these then, but I appreciate the lead and I'll look into them. If they are only a savings of $10. I'd probably still get a Lietz, but if they are a 50% or more savings then it's probably a good deal.
Thanks.