Product ID: PBL-600-0443-00
40-Pin PIA IC

New production of 6821 equivalent Peripheral Interface Adapter IC used in Bally, Williams, and Stern boards.  Direct replacement for 6821, 68A21 and 68B21.  These are not pulls, they are new manufactured chips.

Bally #E-620-29, E-00620-0029, & 0A15-00803-0074.

Williams #5A-8972 & 5430-08972-00.

Data East/Sega/Stern #100-0255-00.
Western Design Center #W65C21N6TPG-14.