This sale is for a lower case board for the Apple II. It will work on any motherboard Rev 4 or order. If your character generator chip is a 2513 (see location A5 on motherboard), then this will work in your board. It has been tested and works perfectly. See the images above for the output.
Installation is easy, just remove the existing 2513 chip from location A5 and the 74LS174 IC from location B8. Install the board and IC adapter making sure the ROM chip on the board has the pin 1 indicator to the left, and the IC adapter has the pin 1 indicator towards the front (see photos). The IC adapter already has a 74LS174 installed, so you don't need to worry about installing the one you removed.
This board behaves the same as the Dan Paymar lower case board that was released for the Apple II in the late 70s. This includes the strange behavior that when using the back arrow key to move over an existing key, it will show a different letter (see photos). It was hard to capture the blinking cursor, but basically most symbols and numbers display a different character when the cursor is located on top of the character, which would only show when you use the back arrow. This behavior is due to the design of the Apple II prior to the replacement of the 2513 with a 2716 EPROM compatible chip.
I wanted a few of these for myself, so I ordered additional parts thinking that others may want one as well.
The board and adapter use round machined pin headers, so they will not damage your board or stretch out your sockets when being used.
Please let me know if you have any questions.