tomfiggy.I think MR ken potter told me that's both,a RPM plus split plating going on there.But on the other hand mike d.Said it cant be both so your guess is as good as mine.
I see some split plate doubling (the black part) on the SE. There is also another line above that. The date looks extra fat. Who knows? Not me that's why I asked. I'll send it in with my next batch to Mr. Ellis.