Inverted letters, we got.... As far as I know, this is the only inverted-letter printing known in U.S. currency. (And I'm still looking for more serial data; the "last updated" date is ancient only because I haven't found any notes in a couple of years!) Answering an earlier question, defective star notes are sometimes replaced by other star notes, but only when the BEP's running a star printing that they're planning to turn into full straps of stars. If you get a full strap of consecutive star notes, it'll sometimes have stars from a completely different serial range substituted into it.... When they're printing stars for use as individual replacement sheets, they just trash any defective stars that they find, since in that case there's no need for the replacements to be consecutively numbered. Back on the inverted star topic, here's one from a series that's not so well known:
I have found recently that I am developing a heretofore non-existent interest in paper money. Can someone recommend a book that describes the production of these notes and answers the questions I had above? I mean starting from rolls of paper and drums of ink on the loading dock, through the entire printing processes, and up to the final counting and bundling of the finished notes out the door.