Vesa adapter plate for Acer G247HYU.
Uses the metal bracket from the original stand that clips into the bottom of the monitor. No extra hardware needed. Use the screws that normally hold the tilt mechanism to fasten the bracket to the adapter.
There are some other Acer monitors using the same stand, those should also work with this adapter. I don't have a full list unfortunately.
The author hasn't provided the model origin yet.