Please help! I've got a plate with this mark on the back (see attached photo). I've looked around the web and found plenty about Schlegelmilch china including a page of all their marks, but can't find this one. While it is hand painted, it doesn't appear to be signed. Can anyone point me in a direction that will help me to verify if this was once a Schlegelmilch mark and if so the age/era of the mark? I would be OH so grateful!