Tiny strap hinges... I've been looking for these for ages. Note: these are not working hinges (they are stamped out of thin brass and have decorative embossing, plus see the photo of me holding one to show the side view). They are pliable enough to wrap around the corner of a box so they will look like tiny working hinges.
Set of 2 with tiny nails.Tiny Brass Strap Hinges kindaDS