These are all from the early 1950s. G. herring used a variation of their ‘All Purpose’ card; printed with ‘Buckle’ instead of ‘Button’, no cotton and with a large capital B in the centre. As the buckle obscures it, perhaps it only served the purpose of alerting the women doing the carding. the partial card is for the cardigan buttons; the backing disk preventing the button pulling through your hand knits.
Cygnet brand is a bit of a mystery, and doesn’t turn up often. Due to the same style buckles appearing on both Cygnet and Walkers cards, I am presuming they were produced by D. C. Quinn.
The Beauclaire card dates from the early 1950s; the Woolworths from 1966-7.