4x DS and 2X NDS is odd as the tension balance is actually marginally worse than 4x/4x (not enough to be a problem) but the tornsional stiffness is lower and that will lead to accelerate spoke fatigue (not by much though) this is ofcourse offset but a laterally stiffer wheel due to the shorter NDS spokes so the net result it the builder might as well have built it 4x/4x as 4x/2x provides no net gain.
Tie and solder may look good but it also a solution to the problem that actually make the problem no better. spoke life is not improved by tie and solder but a problem spoke wont flap about.
The contribution to torsional stiffness of the NDS of a 36H Sheriff Star (or any similar old hub with a skinny barrel) with the DS laced 4X approximates to zero whichever way you lace it.
4x DS and 2X NDS is odd as the tension balance is actually marginally worse than 4x/4x (not enough to be a problem) but the tornsional stiffness is lower and that will lead to accelerate spoke fatigue (not by much though) this is ofcourse offset but a laterally stiffer wheel due to the shorter NDS spokes so the net result it the builder might as well have built it 4x/4x as 4x/2x provides no net gain.
Tie and solder may look good but it also a solution to the problem that actually make the problem no better. spoke life is not improved by tie and solder but a problem spoke wont flap about.
Nice wheels though. Are they tubulars?