thanks for all of the kind words!
using a magnetic closure was an after-thought, but I'm tempted to sneak it in there somehow. i hand-stitched around all of the applique, though, so taking part of it apart may create lots more work. i found these tiny snap fasteners (size 5/0) which look like they are half the size of the average snaps, so i may use those.
here's a pic of the inside.

adding the tiny snaps wouldn't take away too much from the beauty, would it?