for what its worth, I think the Russian coil is wired as shown. Note the direction of the bifilar turns are reversed on the opposite sides of the cardboard divider. This is done so an external magnetic field can induce the correct polarity into all the coils.
(at first I did not understand the google translation where he mentions a balun, now i think I do, he's saying the layout of the coils, (or contour) of his coils forms a balun, i.e. balanced to unbalanced circuit transition, however it sure looks to me like its a balanced circuit, 2 diodes, 2 tuning caps, 2 pairs of bifilar coils, etc..)