Yet another prototype from an NES game has made its way to eBay. This time is in a prototype of the original Prince of Persia game. This uses an UNEPROM board with an EPROM and is dated 6 months prior to the game’s initial launch.
The seller, oregonbay1359, has a feedback score of 1359 with 100% positive feedback. He also believes there might be some differences between this and the final product, but has never attempted to compare the two.