- Blank Square
 

(On the nozzle-plug no information)

- Billet Susan  + two blocks           =     
The button is made in two stages. I made myself pulling button, then serially installed two small grommets. Turns out pulling button with two punctures.

 (On the nozzle-plug no information)

German firm Astor-berning - offers a large selection of original pulling of buttons.

Not far behind, and the Chinese company "Shenzhen HDE Garment Accessory Co., Ltd