New pictures from Helen: I’m envious!
The card below sheds light on a couple of mysteries:
The address gives the clue, 144 Mallett Street Camperdown was the address of British Novelties and also Datar Products. See http://www.austbuttonhistory.com/australian-button-history/ww2-and-onwards-including-leather-buttons-and-obscure-companies/
I have seen a couple of other cards marked Brighton, and wondered if they were sold at the Brighton Button store? Perhaps, rather, British Novelties it may simply have been a brand name.