The Åland booklet issues printed by the Swedish Post printing works have the same types of "marginal markings" found (and widely collected) on Swedish booklets. (Except that the 2008 Lighthouses booklet printed by Sweden has not been found with margin markings.) There are three types of markings, resulting in four individual markings, which can then be found in double and triple combinations. (Triple combinations are usually quite rare.) The markings are Cylinder Numbers (the digits 1 or 2, called "Cyl-1" or "Cyl-2") representing the two half-cylinders of the printing plate; Counting Numbers (a serial number, called "KN" [Swedish abbreviation]) usually appearing once per revolution of the press; and Spine Print (a black rectangle appearing once per 50 booklets, on the outside of the cover, usually, but not always, across the spine; called "SP" [or "RT" in Swedish]).
If the items you seek are not listed or are listed as "wanted", please send your want list; I maintain reservations so that the clients who send their want lists will get the next example that comes in. Also, if you are interested in receiving these on a "new issue basis" as they are issued, please let me know; such clients receive them before all others.
I am often interested in buying these booklets with markings whether or not listed and whether or not listed as "wanted". Please make offers.