Steve Schwartz:

>So, a quick check of the Koechel catalogue shows me that Mozart
>wrote a two-piano concerto, a work which would be new to me.
>
>So I plump for that.

But I know that work, this ain't it.  I agree it's two pianos and agree
that it sounds like Hummel, but Grove doesn't list a two-piano and
orchestra work by him.  Further than that I cannot go.

Scott