In the 18th century, banknotes were generated mostly by copper-plate engraving and printing, and they have been single-sided. Note-building systems remained mostly unchanged through the 18th century.[60] The first banknotes were being made by intaglio printing: this involved engraving a copper plate by hand then masking it in ink to https://german-bank-notes-from-1912110.thenerdsblog.com/33251748/manual-article-review-is-required-for-this-article