Backglass locking mechanism for some Williams System 11s.
I know it is used on Taxi, Earthshaker and Swords of Fury...probably others too.
These are often missing and can't be found anywhere.
These are newly manufactured and exact dimensions of the original.

Be sure your machine takes this part before ordering.
I measured this device in an Earthshaker and here are some cabinet dimensions.
Right side: From the edge of this device to the right side of the cabinet is 7/8".
Middle: From the left edge of this device to the right side of the cabinet is 13 1/8".
Center opening of cabinet: The wood gap is 7/8 wide.

I have a Bad Cats and it does not take this device.
The measurements above are different for comparison.