Thank you all for your very nice and supporting comments! I suppose that this negative perhaps have some potential for making a print with some special effects such as lith, thiocarbamide, sepia and/or ... . Will share if I manage to make a print with some features of interest. Andrew Moxom introduced this Great Wall lens to us with a set of very nice pictures. Hard not to do some B-version of his magnificent pictures (he seems to have grasped, perhaps, the very essential virtues of this special (B) lens!), but ... perhaps it's worth a try! Surprised that this lens right into the sun doesn't show a lot of "aperture patterns" as my old Zeiss lenses would. Perhaps some virtues still to discover!
Best wishes
//Bertil