What Changed with the Jubilee Necks?
Overall, the improvements on the Jubilee necks had to do with weight & response. The physical neck tube and the tenon diameter were not changed meaning that a Jubilee neck WILL fit and work well on a non-Jubilee saxophone. the keywork has been modified to improve response, non-essential excess weight on the horn (which can hinder response and vibration) have been greatly diminished… all of which make the Jubilee models the best Selmer’s yet!

Series III Alto Sax Neck Change #1 – Octave Key Shape Change
The first change on the Jubilee models is the new neck octave key. The key has been redesigned to be lighter in weight. Weight on the neck will greatly impact the neck’s resonance and response. So, by decreasing the weight of the octave key (by around 7%) helps to improve the overall vibration and responsiveness throughout the horn, but specifically in the altissimo of the sax.

Series III Alto Sax Neck Change #2 – Octave Key Mounting Design
They also changed the mounting mechanism design on the Jubilee models that results in a much more stable and secure fitting octave key. The old design had the thicker brass of the key folded over the mounting bracket. This made it very difficult to fit the key tightly and allowed noticeable side to side movement in the key fit. The new design features fixed mounting posts underneath the key itself. This allows for much great fitting control at the point of manufacture.

Series III Alto Sax Neck Change #3 – Octave Key Guide
Selmer actually put this change in to place a few years before the Jubilee. They used to install a “guide” near the octave pip. This guide served very little purpose and added weight to the neck that dampened vibration. So on the Jubilee models (and a few years before), Selmer removed this guide entirely.