Vintage Microprocessor MC68B09EP. The "B" indicates 2 MHz operation. The "E" indicates External clock generator required, no internal clock oscillator like the MC6809P. This batch is new old stock we purchased way back.
All of these MC68B09EP chips, in this batch, have been tested on our MC6xxx CPU tester. We do this to be sure they function properly. Also many vintage IC's we purchase online are fakes.
See the tester below. This is not a simple NO-OP tester. Several test routines are run.