B+O MMC2 cartridge What line grade was it,any good

I just got a bang and olufsen beogram RX2 turntable with MMC2 cartridge from a rack about 80's vintage.How can I tell if it's original cartridge and what quality in their line is it?I listened to it and it sounds like it has potential but is struggling on that table.How do I remove it from that arm?Will it only fit that arm?Compared to my clearaudio Virtuoso wood it leaves a lot to be desired but I can hear it wants to break into 3d sound.