C-H:

Don't the large round ungrounded plugs have notches and contours cut out in them to bypass the ground contacts on Schuko and French sockets?

I have a high-intensity photography lamp that has such a plug (my mom brought it over from Germany when she moved here).

The plug is a 16-amp two-pin ungrounded (with the thick pins) and even has a fuse in it!! Go figure. [Linked Image]