I ran across these sites in the latest edition of Society of Paper Money Collectors, Inc. and found them interesting. I'm sure that many new, and maybe some of us long time collectors of currency, might benefit from this information, so thought I'd pass it along. https://www.pmgnotes.com/news/article/4801/Error-Is-Human-Part-I/ https://www.pmgnotes.com/news/artic...ame suggests, this,upside down into the press. https://www.pmgnotes.com/news/article/4136/ Enjoy.
