4957
The Tektronix 4957 is a graphics input tablet compatible with the 4100A Series, 4110 Series, 4120 Series and 4200 Series terminals using an RS-232 interface.
Input is made with either a 4 button cursor or stylus. The model number 4957 is used for 2 different size tablets, 16.5" x 15.5" and 12" x 18" (Option 2).
The 1988 catalog lists this tablet as specifically compatible with the 4106A, 4107A, 4109A, 4110A and all 4100 Series and 4200 Series terminals.