Well, I just looked into 84 Sega Saturn US MK games at my photos collection and as there's nothing 100%, 1 of these games had the MK: F1 Challenge (MK-81206), probably a misprint. All others (100% of redump db, 9 games) don't have it in their boxes/CDs.
I also found out that the Nights version of db is the one that came with 3D control pad.
Another point, there are two games with numbers 14002 and 14003, which is Three Dirty Dwarves, a game that I dumped and inserted the header serial (that is entirely different): T-30401H. So, please fix to 14003.
If you wish, I can PM you the list of games I've just checked.