Check out this rare Meyer Primoplan 5cm f/1.9 collapsible lens with LTM Leica M39 screw mount

Cameratique contacted me about this rare Meyer Primoplan 5cm f/1.9 LTM Leica M39 collapsible lens they listed for sale on their website:

“This is the collapsible version a f1.9 f=50mm chrome 1.9/50 lens with Leica M39 vintage screw mount pre war rare uncoated collectible lens. When a bright light is used to inspect the lens, dust is visible, this however does not affect performance of the lens in any manner at this stage. There are barely visible with the naked eye light fibres that are the beginning of fungus at a very early stage. When inspecting the front element with a loupe, as always light cleaning marks and hairline scratches are visible with great effort. The rear element appears flawless. So, for ultimate performance and optical perfection this lens should be cleaned. I have not done this, as I believe for a lens of this calibre, the new owner would like to use their own people to do the job. There is no evident haze, the 10 aperture blades operate smoothly and produce a beautiful circular bokeh. The lens shows usual wear marks for a lens of this age. It has been used and it reflects in the cosmetic condition as visible in the pictures in the listing. The focus is a little stiff for my liking but works accurate with a little more effort that usually needed such as on a modern lens. Again, a service will sort this out. I have also included lens caps as visible in the images. Needless to say, there is no other lens like it with a Leica M 39 LTM screw mount available on the global market at this stage and they do not appear ever! You will find a Hugo Meyer Kino Makro Plasmat Leica M before you will find another one of these for sale again.”