One interesting fact that came up is that: No known existing print has been identified as being from an original print run! All known antique prints in existence are reproductions from back in the day. Japan did not have any copyright law, so copying of prints was common. This has been seen by every print having artefacts that have been recognised as some that can happen while copying, and then those artefacts were copied and so on... The British Museum has an article about it: <https://www.britishmuseum.org/blog/great-wave-spot-differenc...>