Be aware that for 19th century stamps and even much later, perforation technology was not like it is with today's stamps. It's not like they could take the time to do a perfect job every time. They did inspect printed sheets, but if (at least) the denomination was clear, it was passed on for sale.
Here's two Iranian/Persian stamps from 1889. They were printed in Paris, not some backwater with primitive tech for the era.
The left one is a typical size and has typical design centering; overall it's a little smaller than current US definitives. But the right stamp is tiny with the design cut in. Note that it wasn't considered so bad that it couldn't be sold - it was indeed used.