Hey, Don, that is a well-thought-out table. Very informative. Who does the entries in StampSmarter? Specifically, this table? I've seen lots of reference materials that (try to) cover the grilled issues. This table seems concise and it's easy to understand. Now all we have to do is to be able to SEE the grill points clearly on the stamps in question! If this is your work - Thanks!! It makes this field a little more clear.