Various parts of Ireland had factories that assembled cars. There were factories in Wexford , Cork , Tipperary and many in Dublin. One factory was Armstrongs in Ringsend which in the 70’s assembled Minis and other Leyland brands. The factory was on Ringsend Road and the Archway entrance to it is still visible (pic below taken from Google Maps).
These posters and Calendars come from the Occupation of Armstrongs which lasted a number of years.
Many thanks to the sender.