This thread reminds me of a question I still have not found the answer for. I know that Bureaus are normally never inverted, only the three known examples (see my recent thread here). But what about the "reading up"... I think I saw (without looking at them longer) the "reading up" also happened for Bureaus in the later years - probably not correct? So is "reading up" like "inverted" and as such not existing for later Bureaus at all?
I don't have any here right now, but in this sale at the bottom right there are two examples of "reading up", for me it's difficult to decide the type in a scan. https://www.ebay.de/itm/US-Bureau-P...391935707596