Old and newer Beutron. The newer ones are of pressed leather with an inserted metal loop shank.
Older and newer Embassy (c.1960 and late 1960s):
Mid 1960s Beutron. These buttons look the same as ‘Opal-glo’ buttons, but that name has been dropped.
Boilproofs ?1940s. Carol shared one of these cards with us a couple of years ago.
1950s Woolworths ‘Hi-style’ and c. 1970s beutron buckle.