518B and 518C always found in Renaissance without EMI filter for compatibility with SPARC module. All Renaissance with built-in EMI module (and label on the bottom indicating compatibility with SPARC module), have program version 518D. Although it is not related (the SPARC module can work with any Renaissance rom version), and this detail does not affect MAME at all, it can give you a clue about the version of your rom without the need to open your Renaissance chessboard. ;-)

Best,
Gerardo