(Pete) There are a couple of websites that have a bunch more French manufacturers on them than I list here. I can't recommend them highly enough:

Luthier Vents. It's in French, but there's a link to use Google Translate. The webmaster can also read and write in English.
ARCHIVES MUSIQUE, FACTEURS, MARCHANDS, LUTHIERS. Also in French. You might want to use Chrome with the auto-translate feature.

Please note that both websites do not concentrate on saxophones, but on all French-made instruments. So don't complain to them or me :D.

A Feuillet et Fils
A Mahieu
Adolphe Edouard Sax
Adolphe Edouard Sax
Date of manufacture is determined from source material at http://homepages.ed.ac.uk/am/gdsl.html (archived HERE)

The Selmer-made Adolphe Sax horns are now in the Selmer gallery. You should give that a look, as some of the Selmer "Gen 1" horns are made from original AE Sax parts.
Adolphe Sax
Adolphe Sax (!)
(Pete) Here's a sortable and searchable list of over 120 A. Sax saxophones, with links to pictures, some videos, and other data.

If you come across a broken link, use the Wayback Machine at the Internet Archive.
and send me a note at pete-at-thesax.info.
Please also e-mail if you see something that's just wrong.

The serial number list I'm using is this one. I'm diverging from it only when a *museum* uses a different date -- provided that the museum has the date correct :D.
There is an additional list of A Sax instruments at http://homepages.ed.ac.uk/am/gdsl.html (archived HERE), which is arguably a better list, but I started using the perso.club-internet.fr list a long time ago.

LAST UPDATED: May 18, 2019
Andrieu Freres
Antoine Courtois
Antoine Courtois
General or Make & Model Information Other Picture Galleries Modern Website(s) Luthier Vents Luthier Vents Antoine Courtois Paris
See also ...

Beaugnier is far better known for making horns for other folks. That's primarily Leblanc, under the Vito and Noblet names.
Blavhe Paris