2513 CG chip adapter board.

An adapter board to allow replacement of a 2513 Character Generator with a 28C16 EEPROM.  Can also use a 2716 UV EPROM if you have a programmer that can handle the 25 V programming. 

The 2513 Character Generator chip was used in many 1970's devices like the Apple 1, 2 as well as most of the TV Typewriter projects published in Radio-Electronics and other magazines.

Search online for the .bin file for the 2513.  Typically found on some Apple related sites.