Keep in mind that these are approximate ranges, and some overlap may exist.

These examples provide limited reference points. While the raw brass baritone serial number 312xxx indicates a 2009 instrument, the manufacturing date of the Series VIII and ST6 models from 2010 suggests they are likely from the same general era. The potential overlap between the baritone serial number 312xxx and the manufacturing date of 2010 for the Series VIII and ST6 models suggests that instruments from the 312xxx range could be from 2009 or 2010, but there is no confirmation of a direct correlation.

To offer affordable student instruments, Hanson historically sourced high-quality components and body tubes from trusted overseas manufacturers (often in Taiwan), which were then meticulously padded, set up, and quality-tested in the Yorkshire workshop. These carry standard sequential serial numbers and are often marked "Designed in England." The Hand-Made British Era

: A premium range with a darker, warmer sound compared to the Series VIII.

The most confusing era for collectors is the turn of the millennium (Serial #851 – 1,400). During this period, Hanson was transitioning from purely "Trevor Hanson" build to "Hanson Ltd."

On most Hanson saxophones, the serial number is located in a standard position for modern horns. You can typically find it: On the back of the body tube. Near the thumb rest or the bow-to-body brace. Engraved vertically or horizontally.

As with most modern saxophones, the serial number and model name on a Hanson instrument are typically found engraved on the , just above the thumb rest or near the bottom bow. Hanson Model Series Guide

A clean, clearly legible serial number that can be verified by the factory significantly stabilizes the resale value on the used market, proving the instrument's pedigree to prospective buyers.

However, for a ballpark estimate, use the following approximate serial number-to-year chart, compiled from owner-submitted data and Hanson’s historical posts.