I think I may recognise your "name"! In which case, I suspect it will be quite difficult to track down this "M B" signature as I am sure you tried lots of places for information
That cane is very interesting, and I think trying for an Id in the Murano forum was a good idea. It looks a bit odd being so large and distinct amongst all those cog canes.
Sorry, I can't help with it. What is the "mark" between the "M" and "B"? I cannot quite make it out, but it looks a bit like a Chess Pawn!
Is the weight perhaps of the regular early or mid-20th century Fratelli Toso type (or at least using those type of canes)?