I got this little lens today. A nice Carl Zeiss Doppel-Amatar 13,5/6,8 Serial number 255311, in a working Compur. No scratches, just a little dust that will be gone soon.
Here's a first quick test shot on 6,5x9 APX 100. Aperture 12,5. Very bad scan with uneven light... But at least it shows that the Amatar is a good usable lens.