The cynic here says it could be even worse than that, ripped out of bound documents in a library or archive. They look rather hastily done/done in. Civilians often have no concept of faulty being bad as James Drummond has shown us many times on
ebay sales.
Which reminds me of a story that will drive most readers to other posts. A friend was working up in California gold country (1970s?) and decided to advertise for Pony Express covers while he was there. He got a call from a lady saying she had two(!). So the guy dutifully went over and found they were genuine (I think) $2 values on cover. After a little haggling, he pulled out cash from his boot (no messing around) but the lady decided she wanted a washer and dryer instead and not the cash to buy them.
As he left to get them, he told the lady to leave the covers in a safe place until he got back. Took him a couple of days to get the free time to buy the washer and dryer and haul it over in his pickup. Meeting him at the door, she then told him that she had the stamps checked out and that they were real. She showed him the now butchered stamps she had roughly torn off the envelopes to show to whoever that was. Back went the washer and dryer.