Halvdan

I remember seeing a device in the cellar at a place I worked in the 90s. It was basically a box with a horizontal slot that had a lever sticking out of it. You could move the lever in and out and to the sides which controlled the pointer. I was told it was a proto-mouse of sorts, but it was just collecting dust so never saw it in operation. Could not have been pleasant to use for any extended period of time. Don’t remember if it had buttons to click with. Anyone remember seeing something like that?