Nice thread!
The Royal Desserts (or Royal Pudding) cards are very special. These black tinted cards were issued in the early 1950s and found on the back of pudding boxes. Kids were supposed to cut them out and complete the whole set. The company made baseball cards, hockey cards, basketball and film cards. The baseball cards are the easiest ones to find and this is because the company probably printed more of them (due to higher demand). The movie cards are more challenging, however, most collectors don't care about movie cards. I think they look beautiful though. Now the hockey set is very tough and the Gordie Howe is the most sought-after one. And finally, the basketball set is extremely difficult to put together. The George Mikan card is very special. And finally, there are blue tint versions found of these cards as well. These blue tint cards were found on the back of Royal Custard boxes only. They are also very rare and worth more than the black tint cards.
I do own some of them, including the baseball cards, and I will post scans on here soon. In the meantime, I found these online:
Black Tint
Rare blue tint version