Thanks David and Dave,
it is I think a non common piece, a upright bowl with a sphere !. And it is
unsuitable. Unsuitable ? Substitute the sphere by a sphere with a clock in it.
Do you think that's not a good idea ? Yes, you are right - a black angel shows me
the time - not comfortable. But it is very interesting and makes a great fun to
think about such objects.
Cheers Jo