Harvey Chalmers & Son, Amsterdam N.Y.
According to The Daily Gazette (new York) in 2017, “Harvey Chalmers & Sons made a splash in the industry in 1911 when it was the first button maker to advertise in women’s magazines and newspapers. The company became the biggest manufacturer of pearl buttons in the world with sales offices in New York and London.”
So much for the power of advertising! Below is a copy of that advertisement.
I have come into ownership of one of these cards, and have seen online a shop display box of the cards. I would like to have that!
I’m not the only one with a liking for American cards MOP (mother of pearl) buttons: Pat has shared some of her collection. See also my posts dating from 25th April onwards: