MAKE photo pool member Splops writes – “One of the many prototype Newton devices Walter Smith brought to the Worldwide Newton Conference. This is a pre-production version of the original MessagePad (OMP) and includes a hastily carved-out hatch on the top of the device. This hatch allows access to a flash ROM slot, used for dumping an updated operating system into a demonstration device. Note the the name of this device is a Notepad, not a MessagePad, as it was named when it finally shipped.” Link.
Prototype Newton Flash Hatch