looks like African Blackwood to me
compare it to Rosewood clarinets from http://www.patricola.com/
Just their home page shows a Rosewood clarinet next to an African Blackwood oboe ... a vast visual difference.
interesting article from Sherman from above link about Rosewood. From making experimental barrels I found the same qualities and problems from Rosewood.
FYI, don't confuse blackwood/M'Pingo and rosewood with ebony, especially striped ebony ... very close but different.
The Symphonie 3 was, to me, the best of the vintage Symphonie line from Leblanc.
FYI, barrels and upper joints will crack on any type of wood due to the just temperature (expansion/contraction pressure) difference from the outside to inside. Excluding any wood deficiencies.
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