This is the inventor of the saxophone's son.
There are a couple of websites out there that have attempted to track
Antoine-Joseph and Adolphe-Edouard Sax instruments. The problems with them
are a) they're missing quite a few saxophones and b) they generally don't
have pictures. I, therefore, proposed to start a project to update the
lists. I never really got around to it, but I thought it'd be a nice
diversion for now.
Date of manufacture is either determined from source material at http://homepages.ed.ac.uk/am/gdsl.html
or through http://perso.club-internet.fr/cjsax/series/adolphe.htm
In 1928, Selmer purchased the Adolphe Sax plant. The first bit of these horns were made with Adolphe Sax parts and look like a horn from Adolphe Edouard Sax. The remainder of the horns looked like a Selmer Super Series horn. Additionally, I'm fairly sure that I have a pic of one with the "Cigar Cutter" octave mechanism.
These horns are generally valued as much as a Selmer Super Series horn, too, but they were initially sold at a lower price than a "true" Selmer Super Series horn.
A lot of these horns have two serial numbers. One is generally a low number and might be the Xth horn from the Adolphe Sax plant after the Selmer buyout. The other is generally a higher number and probably correlates to the Selmer pro-model saxophone serial number charts.
Here are a few offsite horns that you should take a look at:
sn 15352 silver plate Bb soprano at collections.nmmusd.org