There are 67 dates for the Central Bank of Ireland p70.
All of the dates are listed here, with a picture of a note of each date.
https://www.irishpapermoney.com/b-series-notes/date1/bb1/index1b.html
If there were additional dates, we (the Irish collectors) would have seen them by now.
I spent a lot of lunch breaks scavenging through bundles of these £1 notes looking for replacements.
Note, all of the three dates in question are subsequent to the final date of the £1 note, 17.07.89. They also do not correspond to any dates of the other denominations of this series (I checked this just now).
An example of each date of every denomination of the Irish Series B notes (1976-1993) is on irishpapermoney.com, accessible from this page:
https://www.irishpapermoney.com/b-series-notes/ireland-banknotes-b-series-dates.html