This is the first card of ‘Irridel’ buttons I have seen. Beutron used the by-line ‘the beautiful buttons that boil’ in 1947-8 and the name Irridel in 1948-9. After that they retired the name until reusing it in advertising in 1957. This card therefore dates from 1947-8.
The card below is also new to me.
It has the G.Herring logo in one corner and the name ‘Jewel Pearl’ in the other. Searching in trove I found this reference:
G.Herring also supplied pearl shell for compasses in1941 and camouflage covers in 1942. This last item surprised me, until I checked my notes and rediscovered that they had a history as “a manufacturer of twine, jute, flax”