There are others with far more knowledge than I have regarding the Kahns. They issued the basketball cards from 1957-1965. There's never been a Russell nor a Chamberlain, so the big stars began with Robertson and West in 1960. The 1957 set does have Stokes, Twyman and Lovelette though, and they are all very hard to find. The 1950's cards often will go for $400 to $500 for any player. Annually the issues were from about 9 to 13 cards to the set, except 1965 which i think is smaller. There is a biography on the backs of the cards, except for the 1961's which are blank backed.
I do have the 1961 Robertson and West. The West is graded a 3, and the Robertson is in about the same condition.
Let me know if you have any other questions. Thx, Don