One we missed mentioning back on August 15: Bryan McPhail, a MAME developer, identified a different ROM set of Capcom's "1943" and added support for it in MAME during the MAME 0.189 development cycle. Based on his analysis, it appears to be the original Japanese ROM set, and the set that had been supported by MAME a bootleg. More on this detail and analysis here:
http://www.bryanmcphail.com/wp/?p=1324
Added in: https://github.com/mamedev/mame/commit/19cb321e34d3716044863936af00586d8c3aa8e0
[Posted by: Stiletto]