I just got this amazingly rare and special piece, an otto Link 4-ring transitional piece from Tonemaster to ‘Super’ Tonemaster; this is the first Super Tonemaster before the ‘Double Ring”. It is a NY production piece from the Otto Link (not Florida, Ben Harrod). This has the first super tonemaster body and from my feeling a slightly different chamber from Tonemaster as well, but not exactly the same as double ring. Of course the double rings models vary plenty amongst themselves but this still feels a bit different to me.
This type of piece was immortalized in photos of John Coltrane, specifically this set by Charles Stewart taken in 1964. He was always switching mouthpieces of course but it is interesting that this is somewhere near the ‘Love Supreme” recording time period.