Who knows?

AdamR said
Good info, Were did you get it from ?

I always find some really helpful info here just by asking, guys like Longone and many other members, otherwise I find some here and there.

This site is great for resources and concourse judging ...
http://www.mmcdetroit.com/ICCA/References/Inspection_Marks/Inspection_marks_1_23_2003-1.html.