DATAMATH PICTURES

The first - rare - series of the TI-68 uses a metal bezel around the display instead the later plastic frame.	The second series of the TI-68 added a groove around the ON-key and uses the mentioned plastic frame.	The third series of the TI-68 manufactured either in Malaysia or China has a cheaper appearance.
The first series of the TI-68 uses some screws to secure the case parts.	The backside of the second TI-68 gives some other differences: No screws...	The backside of the third TI-68 with some screws again...
Even the internal construction of the TI-68 variations is different: The printed circuit board (PCB) of the first version was mounted with some screws, the later product uses heat stamped molds to fix the board.