Luke the guy that sold these stole Jon's pic of black mission nl said its the true black Madeira. Basically went around and took names of Portuguese figs we have here stole pics lied to his customers broke import laws and is pulling another mifigfun problem. New people think they are getting a deal so they are buying them.
And it wouldn't matter any way if the fig is similar to black maderia it's not black maderia.
Here is an email I received on this subject from a European fig collector
MADEIRA BLAK variety, not the same variety as the BORDISSOT NEGRA, probably a very similar variety,may even have similar genetically dendrogram, originally from Portugal, but agronomic descriptors do not match, the fig tree has only unilobuladas and trilobed leaves, is later, has drop of honey the ostiole, known the first century before Christ, mentioned by Pliny and Colummela in Roman times, known as African Ficco, also African Barnisoto, Barnissote noire, Bernissou, Bertino, Bouriansoto, Brogiotto fiorentino, Brogiotto nero, Brosciotto, Bourjansoto, black Burjassot, Della brand, Paris, Violette de Solliès, Burdassòtta, Bajasote, Boujasote, Bragasote
So for simple minded people bm is an unknown possible sport of a known variant.