Howdy, This is my B flat Plateau Clarinet, Albert system. The Makers mark is an Organ Console with the word Console over the top of the mark. The other marks are France, S-N 2017. I have eliminated about 40 French makers. Am now contacting M.I. Museums. The Clarinet is from the 1920's-30' period. I bought the Clarinet about 1960 in England. Does anyone recognise this Mark? also, Organ Makers who sold Clarinets, one would think this instrument could be a Stencil. Any info. most welcome. Thanks Keith.