Can someone supply me with information on the $20.00 strikes that were put out by Casino Windsor in Canada. I have two, one states Collectors Series TM on top and shows a race car for the Detroit Grand Prix with GDC markings and .999 inside. The other states Limited Edition Collector's Series, shows 2 birds (Common Loon} swimming with GDC markings and .999 on the rim on both sides. Did they put out two different series of coins and can someone tell me a fair value of the strikes.