OK, I have fully cracked the marking system on the Black Lions. It's very similar to that of the White Lions, but with a few noteworthy differences.
First, I'll upload some photos - note the labels I shall give them.
First, the four deuces. Then look at the upper left corners of the back designs of each deuce. I've isolated four of the split-spade designs in each, and you'll notice that along the center line, one of each of them is lighter than the other three. That's the indicator for suit - the position of the lighter split-spade tells you if the card is a spade, heart, club or diamond.
Continued next post.