Hints for dating your carded Beauclaire Buttons
NB: Where I have not yet found confirmation the dates will be preceded by a question mark.
October 1941: O.C. Rheubens & Co. Ltd, becomes General Plastics Pty. Ltd.
1946: Listed on stock market as General Plastics Ltd.
?1950: Pale blue cards with cream details and the name Beauclaire in an oval appear. These appear in a large 12×18.5 cm and a smaller 6x9cm sizes. At first these have a plain back; later there is printed information.

The earliest (probably) do not have ‘A GP Product’ printed at the bottom.
1951: The name Beauclaire first appears in newsprint .
1953-4: ‘The Twinprufe Button”.
1954-7: Cards printed with ‘Beauclaire’ in a loop. Earlier versions have a banner at the bottom, and later an approval from the dry-cleaners.
1954-5: ‘Tiny Tots’
1954: ‘Moonglow’, “Approved by Dry Cleaners’ and Dyers’ Association of N.S.W.”
1955-7: “Approved by the Federal Council of Dry Cleaners of Australia.” The name ‘Moonglow’ superseded by ‘Superglow’.
?1957-8: Both Beauclaire and Leda cards appear with a similar design.
1958: “Leda by Beauclaire”