Nail Down Washer
Thats what these machines were called in the trade.
The nailed down name came from the fact that this machine was not intended to be sold, it was intended to draw people into the store with a low price and then the sales person would try to up-sell the customer.
Nail-down meant that the machine was nailed down and not to be sold, sales staff were actually penalized if they sold one of these machines.
John