It's mainly used for plastic boxes molded in one piece with the hinge
being a thin strip between the box and the lid. The plastic control
surface hinges used on model aircraft are inexpensive and about the
right size for a purse, if not the right look. They would probably have
to be attached to the cast frame; polypropylene might not be rigid
enough for the whole thing, it's practically the definition of "cheap
plastic feel", and it's too syrupy when melted to cast without some
sort of pressure injection machine.

The hinge in your example photo apeared to be sheet metal.

jw