I am slowly putting this set together it is WAY on the back burner

I have about 60% of the set, all my wants are in the hi series numbered 73 and above. It's a great little set. I like this card I found in a bargain box a few months ago.
Now a very weird question for Al. We all like to collect the inserts (coins stamps rub-offs), was there anything special about the included marbles? Could a person put together a full set of the 1960 Leaf marbles? Or were they just mixed in with the rest of our "aggies" "shooters" and "steelies"
Larry