25 Øre - Frederik IX

Denmark's switch from the older silver-content øre coins to copper-nickel for this denomination was driven by the sustained rise in silver prices through the late 1950s and early 1960s, which made the previous alloy economically untenable to strike. The 25 øre in this composition first appeared in 1966 and ran until Frederik IX's death in January 1972, when Margrethe II's accession ended the series.

Circulation was heavy throughout this period — the 25 øre remained a genuinely functional denomination in everyday Danish commerce before inflation steadily eroded its purchasing utility.