Thank you to http://www.materiotek-mercerie.com/en/content/16-history-buttons# and to https://boutonsweb.fr/collectionboutons/Marques.html for the incredibly informative websites and the information on A.P. & Cie of Paris. The stamp stands for Albert Parent and Company, and it points to production years between 1912-1939.
Parent worked with Liéger from 1912-1916 and alone from 1916-1923. He worked with his son and his brother from 1924-1939.
Because I am unsure as to the era these buttons were made, I am marking them as circa 1930s but they could very well be older.
The buttons measure ½ inch, and there are 15 available. Each button is $4.00.
Thank you for looking.
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