New Maxart:
This may date from the 1950s as during this era the dry-cleaning issue was a marketing issue.
Carol’s new koala:
Seen online:
This style buckle first appeared on Beauclaire branded cards from the early 1950s. This Beutron card is from the 1970s.
Make your own buttons and buckles:
From the Queensland Times, 22nd February 1937: