> Does that mean the use of the bold outline boxes was an error, or was
> it used to differentiate between the 5.9's and the 4.1's?
> (for me personally, 2 different sizes of thin outline boxes would
> have done that better).

Yes, the two size/weights of boxes were used to differentiate between
the two calibers of secondarys (5.9" and 4.1").

MRB