Vintage working IBM AT 5170 computer in excellent cosmetic condition.  The system board is a very sought after IBM AT motherboard with piggyback dram memory chips for redundancy. (These motherboards sell for $650 dollars on their own.)  The original 512KB memory has been increased to 2560K with an AST Advantage Premium memory card.  80287 math co-processor installed.  Has a 20 MB hard drive and a working 1.2 MB floppy drive.  Has OEM VGA video card installed.  Included is an IBM Model M 101 Key Keyboard. New CMOS battery installed.