irishpapermoney.com

When you think of money, you typically assume it is of a higher quality than a 5 year old's hand-drawn map of Ireland. Why so many errors, then? What was up with quality control back then?

It is the normal amount of errors in any printing operation.
Approximately 0.5% of all bankotes on average are replacement notes. This has been determined by surveys of random populations of notes in circulation.

Current US issues still use star notes to replace errors in production.

There are also countries which have a higher use of Banknotes per capita, particularly lower denomination notes. These tend to have a higher number of replacement notes, and in the likes of Indonesia, Thailand, Malaysia, Singapore, a more prevalent culture of paper currency collecting.

I miss the Irish replacement notes.
They added variety to collecting Irish notes, especially as there might still be replacement dates which haven't yet been catalogued!

I believe this extends out the range for this date ?