Introduced in 1919, the School model had an open, integral stand with a slide-out tray in front and X-stretchers near floor level, which formed a rest for the horn when not in use. When the horn was in the playing position, a hinged flap covered the stretchers to support more records. All this lower section has been removed in the present case. The rigours of school use, and the tendency of institutions to discard obsolete equipment rather more readily than families do, account for the scarcity of this model. A few were used privately (this one may well have been), by experimenters like Percy Wilson. A consequence of that is the ability of his Panharmonic horn, and subsequent EMG horns, to fit HMV machines.

In the re-numbering of the entire HMV range in 1922, the GFO became Model 26 (and was thus transferred from the Cabinet category to the Horn). About a year later, it gave way to the more utilitarian Model 27.
The price was £25.0.0s until July 1923, when is was reduced to £22.10.0s. The original cabinet height was 42in. (106cm)