This deck would have an MMC1, 2, 3, 4 or 5 in it - are you sure some of the writing hasn't rubbed off?! Alternatively, can you post a picture?

yes here is a picture

Well, I take it back. Not seen one of those before!

I think it's fake. For me, it looks like a cheap Tonar element with some lookalike print on it. The cartridge misses the transparant protection cap in front.   Edit: I missed the cap in the pictures. It's there. So, I'm baffled as wel.

The original MMC20CL had a sapphire cantilever and a contact line stylus which was the top of the line for the MMC20 range. The MMC1 and 2 had again a sapphire cantilever and a contact line stylus. The cantilever on this example looks to be metal - probably aluminium as the sapphire cantilever is transparent. I would suggest this is something like an MMC4 that has been altered and a contact line stylus put on - I have a MMC20SH on my Beogram 4001 which is a MMC20 S originally but with a better cantilever and a shibata stylus. I wanted a black cartridge to match the black arm and I am less keen on the Soundsmith cartridges - personal taste - they are demonstrably excellent but have a different sound compared to the MMC20 originals.

Hello Jens. I have brought a MMC CL-X last week. Tested it on my Geogram TX with the Ortofon Test Records 2&3 , and it sound just like my MMC 2. The MMC CL -X it has a sapphire cantilever and a line contact diamond on it. Going to test it against my MMC 1 the next days. And old employe at B&O told me that the MMC CL and CL-X was sold separately,  with an adapter ( witch I also have) so that clients with other brands of top record players got interested in Top B&O  pick up’s. He reminds that the Cl was  equal MMC 4, and CL-X , MMC 2. I haven’t seen the cantilever ( aluminium) on a MMC C L if it is a  MMC 4, can you send a picture of the cantilever of your CL Best regards from Denmark. Thomas Veirø