Heavy 20 blade Xenon 1.9/50 info/value

[StillSanj]

I have finally received my Xenon 1.9/50. I was ecstatic when I received it. The glass is impeccable except for the expected hazing. The lens is super heavy a la Kine Tessar (brass?) and best surprise if all...it has 20 blades. It is also lacking an auto aperture rig.
Here are some pictures.





So can anyone provide me with more information? I haven't been able to find any lenses like it.
Is it a Kine exakta xenon? How rare or valuable is it? It came on a "Exacta" camera with the "c" spelling and has a note of 1948 on it, but that doesn't mean the lens is. Any information or opinion on my new find would be greatly appreciated,
So I have a better understanding of what I have on my hands!
Cheers.

[Lightshow]

Looks very nice, I had a Schneider 35/2.8, was a very solid lens, heavy too.

[kds315*]

Congrats, looks very good to me!

[zanxion72]

What a beauty! Those blades are mesmerizing!

[luisalegria]

The serial number suggests it was made in 1952.
That's reasonable based on its looks.

[jajong]

The lens must be a very early version of the Xenon. Only preset and automatic aperture are mentioned and dated around 1953 or later. The camera is interesting as well. Have a look here at this excellent site about Exak(c)ta cameras: http://www.wrotniak.net/photo/exakta/exakta-serial.html

Cheers,
Jan