Meaning of dots on Blazer 9x19mm Headstamp

I jest received a question from an official source asking for the meaning if the three dots on the Blazer headstamp pictured below.

The distinctive “R"s and the 9” are a clue and I know it has been discussed, but we have houseguests and I don’t have time to research it. We are leaving town tomorrow morning.

Please post your answers and I will send him the URL for this topic.

Happy New Year to ALL of you on the IAA Forum, members and ghosts!

Cheers,
Lew

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Lew,

Forum member dArtagnan mentions a BLAZER brass case 9mm with 3 dots (dot/dot BLAZER dot-headstamped 9mm Luger) and attributes it to SPEER.