There are definitely 4 Slazenger IMF rackets in total (and maybe more):-
Slazenger Phantom IMF - dark blue matt paint.
Slazenger Phantom IMF - light blue gloss shiny paint.
Slazenger Challenge Comp - dark blue gloss shiny paint.
Slazenger (can't remember name) - brown matt paint.
I will try and find photos on internet, and show below, as have no working camera. Here we go:-
I can't find a photo of the brown one, but i can assure everyone it does exist as I have held one in my hand, but just can't remember the name of it unfortunately!
I do own the 3 versions shown above, but not the brown one. If anyone knows about it please let me know.