Series-1 Canada first 50years of flight sterling silver (w)24k gold cameo insert

This proof set of $20 each nominal value coin 92.5% silver(w) 24k gold cameo insert. And weighs exactly 1 Troy ounce (31.101g) and only 50,000 were struck world wide. This is series 1 aviation 10pc set featuring the first 50years of flight all proof coins with authentication certificate by royal canadian mint with signatures. Comes exactly how you see them in pictures provided. 1990-1999 when made