Anyone familiar with the Swissproducts Type P/S (steel) diopter?

In 2009 there was a discussion thread about a prototype diopter - the SwissproductsType P/S (steel) Diopter. This Diopter is calibrated to range from 75 yards to 1,000 yards, is made of steel and is Eye Relief Adjustable. No rail changes are necssary...
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