This evening, I did my usual monthly sweep of eBay, just to see what was cooking. One 10S "everything but the low Eb" that I put a bid on (upon?), plus piles of Selmer horns all the way back to the 1930's with some variation or other of the various Selmer innovations/extra mechanisms.
Then, I punched the magic name "Leblanc" into the search blank, and.....nada. Oh, there was the usually assortment of Vito, Noblet, Normandy and Leblanc horns ("A Vito Dazzler in the very popular green color, only $600! LOOK!"), but, out of all of the "Leblanc" horns, not one had an articulated G#, fork Eb, or low Eb. (There was one LH Eb lever on an up end horn.)
Now, Selmer discontinued the "full Boehm" option and the other add ons (and Maezzo and Grachi "systems') back in the late 1970's, near as I can tell, while Leblanc kept on keepin' on with full Boehms and the Pete Fountain "near full Boehm" as late (in part) as 2000.
So, selmer stops circa 1975-ish, Leblanc around 2000.
Question: Where are all of the Leblanc alternative mechanism horns? Has anyone seen any of these?