We had these mother of pearl buttons replicated from an original button we had in our archives. They have been etched with a traditional 4 hole marking.
They are sold in a pack of 3 on our little man card and can be used for marcella waistcoats and as dress studs. Very sturdy indeed so no more problems with them coming apart!
They come supplied with the pins on the back.
All of our marcella waistcoats (WC232) now come with these buttons attached.