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.
  • Eb Alto Mouthpiece Eb Alto Mouthpiece