Single-pole foot switch with screw terminals. Designed by Achille Castiglioni

The part looks exactly as advertised and was relatively quickly delivered. However, be aware that if you have a lamp with a "push button" - like I do - and not a "switch" then this replacement is not for you. I was after a button and not a switch, so the part to me is useless. Unfortunately, the button that broke seems to be not individually available. Otherwise a perfectly nice replica of a classic designer SWITCH.