Lovely material to fill out the larger story of the private die proprietaries.
Not to beat the dead horse of what is a facsimile, the John F. Henry item is from a firm that used a private die proprietary stamp. By no stretch this does not imitate their private die stamp, but presumably honors the founder of the firm. I find it hard to call this a facsimile. Yet this in no way diminishes the appeal and importance of the larger story of this and so many other similar paper items that were an important part of the branding of their product. Branding remains an important part of the marketing of products and goods today and finds its roots even further back in time to the late nineteenth century.
Basically just from researching past auctions and articles. Maybe some of the experts here can provide a clearer explanation. Obviously the bottom one incorporates many of the components of the middle one so even though it doesn't say so I would assume it also to be an ABN specimen.
Maybe the ABN imprint was at the bottom of the sheet rather than on each individual stamp? Just a theory.
In addition to the ABN logo, the label in the middle is clearly engraved; the bottom label almost certainly is not so I suspect that ABN did not create it. The middle label was clearly created after the 1906 Pure Food and Drug Laws, and the bottom one probably was as well.