Final Production Pull?

[tep392]

Does anyone know what this is? It just looks like someone put a ZIF socket on a Ball Blazer cart. The chip is a production mask rom. He's also selling a similar Combat cart.

http://www.ebay.com/itm/ATARI-7800-POKEY-BOARD-with-BALLBLAZER-Final-Production-Pull-C026461-/141750046393?hash=item2100f60eb9:g:xi8AAOSwT6pV07lg

http://www.ebay.com/itm/ATARI-2600-TEST-BOARD-with-COMBAT-Video-Game-Final-Production-Pull-/131641349177?hash=item1ea66f9439:g:ODcAAOSwhcJWM~cH