But what is a StroboConn
The StroboConn is a super high precision mechanical tuning device that was invented in the 1930s: https://patents.google.com/patent/US2286030A/en
The 12 wheels allow you to see very note at once, so you can see the relative strength and intonation of your harmonics at the same time as your fundamental note.
Production continued through World War 2, as it has industrial uses beyond tuning saxophones.
On that patent, you will see Allen Loomis as an assignee. He was heavily involved in the Conn Experimental Laboratory, and if you click his name you can see he has tons of really interesting saxophone patents.
The Strobe tuner division of Conn was sold to Peterson, who still makes strobe tuners including 12 wheel versions, but they are made differently.