Nice story Bob. Worth depends on several factors... Condition of the ball, authenticity (which seems to be ok, but you'll run into a skeptic here and there)... How many players are missing... How many HOF'ers are on the ball, etc. Even the type of ball it is. Since it was from Carlton, I'm guessing it is a legit NL ball? That helps.
If it is in average condition for its age, has the HOF'ers and is relatively complete enough to be considered a "team" ball, I'm going to say it's worth $400-$500 or so. I am, however nowhere NEAR an expert, having never paid for an autograph in my life.... Just collected what I could get on my own.
"Herman Franks to Sal Yvars to Bobby Thomson. Ralph Branca to Bobby Thomson to Helen Rita... cue Russ Hodges."