The 1939 booklet (Facit #H2) containing five different panes of M-30 Lion stamps exists with five possible "edition numbers" handstamped in violet on the lower right corner of the back cover: 1, 3, 7, 10, 11 (and rarely without a number). According to the literature, the purpose of these numbers is no longer known. Each of the five panes independently exists either upright (R) or inverted (I); they also exist with a fully perforated binding margin (x) or with an imperforate binding margin (y). Each pane will thus be identified as Rx, Ry, Ix, or Iy. With the cover edition numbers, these differences result a lot of theoretical combinations, however, it is probable that some of the combinations do not exist. There seems to be no information in the literature on relatively rarity of the numbers, positions, or perforations -- some are surely much scarcer or perhaps even rare. Of the edition numbers, 1 and 11 seem to be scarcer. R vs I panes seem to be roughly equal, however, perfed (x) margins seem to be a little more common than imperf (y) margins. There are many combinations that I have either never seen or have only seen one example.
All are NH, VF, complete and fresh. If you are interested in building a specialized collection of the combinations, please let me know.