How does one do Hagbah on a Torah in a Sephardic Torah case, such as one of these silver cases (picture courtesy of Hadad Brothers) :
Caution: don't try this unless you have some measure of physical strength. This is not like an Ashkenazi torah where balance is the key.
Also, this has nothing to do with the silver case - it is related to the Sefardi-style Torah's (many of which will not have a silver case like the one shown above).
AFAIR, the chazan puts the Torah on the Bimah (the table where the Torah is read) (which is level to the ground, not tilted upwards). It is then picked up and opened away from the person doing Hagbah.
I don't know of any public domain images, but here are a few pictures on Google images.