This board is a direct replacement/reproduction for the Bally Say-It-Again board used in Centaur and Centaur II.
Installation is easy and it comes with instructions on how to install and operate the board.
Please note that these Say-It-Again boards are only compatible with Squawk and Talk AS-2518-61B boards (Rev D with 10 pins on J2). 
Bally Reference #AS-2518-81