Original Hitachi integrated circuit (IC).
Part number HD63B09EP
Description: Microprocessor, 8-Bit, 2MHz, CMOS
Package: 40-pin DIP
The HD6309 was Hitachi's low-power version of the famous Motorola 6809.
No longer manufactured. Original part for replacement in legacy circuit, or for general hacking/tinkering. Datasheet readily available:
https://pdf1.alldatasheet.com/datasheet-pdf/view/87218/HITACHI/HD63B09.html
Old new stock, been stored in anti-static foam since new. Untested (no way of testing), but never used. Mint condition.
Sold as seen, no returns.