The Shure Lineup
The V-15 III Super Track was number one in the lineup.
Next came the "High Track" series carts; The M95ED was #2, second only to the V-15 Type III.
Next came the M91 series, then the M75 series, then the heavy tracking M93 series. That's the end of the "High Track" series.
Note that you could get "High Track" carts with elliptical or spherical styli and in various tracking weight ranges - such as M95ED vs M95EJ, or M91ED vs M91GD and so on.
After that we have the M55 series, M44 series, M7 series and finally the M3D and none of these were considered "High Track" cartridges. This was the lineup in the mid 1970's when Shure ruled supreme.
The M91ED was probably their most poular cart, and it was supplied by many turntable manufacturers as their stock cartridge. In fact, Shure would even sell you an M91ED preloaded headshell for Dual, Garrard Zero series, Miracord and PE turntables. That cart would work very well with almost any arm and sounded quite good - not as good as the M95ED or the V-15 III, but pretty darn good!
ps - I realize that this is an old thread, I just wanted to set the record straight (pun intended).