[Brightcolours]

Both lenses have a too narrow barrel, whether that is on the front or the back or both I do not know (not knowledgeable enough in that field), but my guess is mainly at the back. They make cat eye shapes on bokeh discs almost over the entire image except the center. 

 

The Canon FL 55mm f1.2:



Some outlining can be seen too.

 

The Nikkor-S•C 55mm f1.2:



Similar outlining, and a ridge around part of the back element (seemingly there as part of holding the back element in place) is visible in the bokeh disk shape.

 

Again, the colour difference between the two lenses is apparent.