It looks more like an older "professional" model horn to me. I've used these in the past, and the two joint wooden ones like this were formerly Leblanc's top end instruments, equivalent to the Selmer and Buffet instruments. A mid level two joint horn intended for the "student" market would carry the Noblet imprint rather than the top end Leblanc one.
(The horrid Bundy student bass may have had a better means to implement the peg, but it was inferior in just about every other way.)
The "long rod on the back of the bass" linkage for the "triple hole" register system did not appear on "pro" Leblanc horns until sometime after the 1970s. Prior to that, all of their horns had the "no long rod on the back", "double hole" register system, the one still found on the majority of student level basses.
As compensation for this, Leblanc did give us the "fork Eb/Ab" on the lower joint. Fingered R|TH|•••|•o• to sound Eb, it was viewed (by Leblanc, at least) as a "better" alternative to the LH Eb/Ab lever which is now common on clarinets. On a loaner horn I once had to use, this "better" fingering was never quite right, despite herculean efforts of my technician to set it up properly.
The socket for the neck on Leblanc horns is a better way to attach the neck, as the metal neck socket is not as susceptible to cracking as a wood one. However, the metal socket can come "loose", causing equally significant problems as cracking.