Nice job from Alan Starkie.
I got an original many years ago from Tamarkin. Back then I did not know they were that rare. Since then I've never seen another one for sale. I used mine a lot, because it is so much nicer than a chrome one.
I also have an original SBLOO in black paint. I bought it about ten years ago from someone in LA for $800. It was expensive, but now they are worth ten times more.
The black Voigtlander ones are pretty rare too, just like the chrome ones that came on the Bessa T. These chrome ones are different, I've heard people complaining about them. The black Voigtländer is a joy to use, I'm very happy that I got one. Maybe chrome ones of the same model exist, but then I prefer a Leitz.
Leicapixie, I only use these brightlines on the Leicas I, II, III and IIIc, not on an M.
Erik.