@ Krampus - thank you for the tips. I am not sure is it smart to contact an bestselling author (as Mr. Scott is) about this single one, probably unsignificant, paper? I will need to think about it But, thank you for the advice!
@ RememberSchiff - thank you for the details which I didn't find out. On the printing is visible publisher: "POWERS ENG CO"... which is also known as "Powers engraving company" from New York. I have tried to Google out "Boy scouts" and "A message to the chief" together... and I didn't find any other sample of this card mentioned anywhere. Also, they way that it is printed (front to back in upside down position) possible suggests that this could be just a trial printing or something... in that position printed as an error? I found interesting how emblems are printed over the photgrapy, and the photography is still visible under the bottom of the right emblem. All looks very crude for the later printings (1920-ies, 1930-ies), especially when it was made by a respectable company which Powers was.
@ Stosh - it looks that a lot of info on this leaflet is not reliable... possibly written and prepared in the very early years when the real numbers and data have not been available. So, possibly was a gossip that already are "over two million boys" in the world are scouts, and, who has prepared this leaflet, didn't have a source to check it. That will also explain other mistakes in spelling (Meyer - Myer, which RememberShiff notice). In the very early days, the reliable sources (as almanacs or so) didn't exists, and that will explain why the numbers are not correct.
When we are talking about mistakes errors... please, excuse me for my insufficient English... I am from Central Europe