I found an experimental planchett 1999 PA , green hue , THINNER than regular - but all found so far have been THICKER, mine weighs 5.6 GRAMS - all others found so far weigh 5.9 to 6.3 - regular one weighs 5.75, it is the TYPE 4 - no copper core. what i want to know is, since mine is slightly different in 2 of the catagories, but matches in 2 others. Is it an experimental and is it a new type?