I think it may be buffalo,the one which gives the milk for mozzarella
> I've seen some horn covered keyboards in some italian instruments. The best
> example I remember is the enormous Giuseppe Mondini 1701 harpsichord in the
> Beuermann collection and an anonimous italian upright (!) fortepiano in a
> private collection here.
> The apparence of the keyboard from a distance is the same of an ebony
> keyboard, since the colour of that horn was almost dark grey. I don't
> believe it was cow horn, because of its colour and cow horns are almost
> empty inside and it is difficult to cut a thick slice from them.
> Horn, as ivory, can be bent rather easily soaking it in vinegar and may be
> that one can cut raw pieces to be straigtened with a press after the
> soaking, avoiding the painfull task to cut it in slices.
> I've seen that type of horn (but I don't know from what animal it cames)
> some years ago by Rivolta that had about 200-300 horns to sale. They were
> dark grey colour, very thick and heavy, and the main part of it was massive,
> not empty, so one can cut thick pieces from them.
> Moooh to all !
> Andrea Restelli