Here's an entry from the 'Clarinet BBoard':

"From The New Langwill Index:
Cabart WWI fl Paris 1842-c1869, a1893-p1950, fl Ezy 1869-p1950.
1842 established in Paris; 1869 re-located as THIBOUVILLE-CABART at Ezy as successors to THIBOUVILLE-BERANGER (according to Jansen, it was `Cabart' that was successor to `Thibouville-Beranger' while, according to Rendall, `Cabart' was successor to `Thibouville-Cabart'); according to Pierre, from 1893 certain artist-quality instruments made by `Thibouville-Cabart' were marked `Cabart'; in the 1930s `Cabart a Paris (Thiberville succr.), Ezy' (see THIBERVILLE) was reported; from c1946 used as trade-name by a French WWI maker/ dealer." 

MARK:
(galleon) / CABART / A PARIS / b # (natural)
EXHIBITION:
Paris 1867.

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