When I added the Gomez and Mills Multi Ring/Groove Sharps to the taxonomy I didn't have a MM-192 at the time. The true MM-192 (TT 105) has no large band at the top of the grooves. I have classified the TT 104 in my collection as a MM-192var having the band above the grooves. I have attached photos of the MM-192 as well as a MM-192/TT 104 side by side to show the difference without the band and with the band above the grooves.
TM-28A1
.481 x .869 x 290
TM-28A1 left
.481 x .869 x 290
TM-28 right
.471 x .805 x 247
