This button appeared in advertisements during 1956.
I recently shared 2 other color variations of this design; see http://www.austbuttonhistory.com/9th-november-2021/
The “Beauclaire Rose” on two differing branded cards.
The partial Beauclaire card dates from the early 1950s. Roger Berry distributed buttons from around 1946. The earliest example of this design that I have seen may date pre-1941, on a Herrman Co. card. See http://www.austbuttonhistory.com/25th-july-2020/