Below is page 85 from G. Wirnsberger's book on proof marks.
He indicates Suhl "crowns" did not have the pentagon shape in the middle of the crown...rather the center looks more like a bishops' hat...
Maybe this is what Dwight was referring to when he was discussing "petal" shapes...
Cannot add anymore as I am away from my library and only had a few of the pages in this book on my laptop...
Regards,
Pete... <img border="0" alt="[typing]" title="" src="graemlins/yltype.gif" />