If you are referring to the neck design, here’s another late 60s Conn tenor with the same:
www.barnardrepair.com

Barnard Instrument Repair — Conn 10M Tenor Saxophone M37xxx
This is a 1969 Conn 10M. It is one of the last years this model was made in Elkhart, Indiana. This horn is playing great on older pads. It has a big sound that can keep up with any band. The body is in decent condition, with moderate amount of scratching and lacquer wear. There are a few minor din