This is a custom designed case (ORIGINAL by COREi64.com), for the Texas Instruments TI99/4A 32K Sidecar memory expander (not included) and the TIPI expansion board that plugs into the 32K expander. The case is available with the activity indicators more conveniently and visibly located on the side. It is available in many different colors. The case is held closed with four 16m black oxide screws threaded into brass heatsets inset into the lid.
Because of the size of the case, additionally, a thumbscrew foot has been added to the design, to take the strain off the computers edge connector.