I have been looking at this for some time now and have come to the conclusion that it is probably m.elegans, a subsp. of m.haageana (Hunt). It will in time offset, as mine has. Although your plant appears to still be in a small pot, so quite young to be offsetting, or is the photo deceiving! It is not uncommon however for m.haageana to offset, as in the case of susp.schmollii.