There was a very interesting color variation in those tubes, outside of the typical Crolle pattern. You can just see it in Jason's pictures. There are darker "bands" of color running through the Crolle pattern, running spirally up the tubes. These only became visible during the later rusting cycles, so I pushed the tubes according to what I call the "German School" process, designed to bring out maximum color variations, as well as internal Crolle detail and the "Rosen" look of visible spiral Ribband welds. It looks like the steel in one of the billets was slightly different, and colored slightly darker. I can't imagine it was anything but intentional, enhancing the pattern of the tubes. A testament to the high degree of both the skill as well as the art of these tube makers.
I didn't realize until I saw Jason's pictures that the set was for a higher grade gun, that listed new for as much as a Parker Grade D.
Regards
Ken
Last edited by Ken61; 01/13/17 06:01 PM.