A Box Of Bank-Wrapped Half Dollar Rolls With Two Proof "Enders". What Else Did It Contain?

I always search rolls of bank-wrapped half dollars to see if any of them have silver "enders". A box I acquired this week didn't have any of those coins. But two rolls had proof enders.

I initially hoped that box contained a collection dump that was a mixture of silver coins and proof coins. But it contained only one 40% Kennedy half dollar that probably wasn't part of the proof collection dump. Eventually I found eight proof coins (most of them dating from 1972 to 1980), plus an attractive 2008 uncirculated commemorative half dollar that has a low mintage (ca. 100,000). Finding this number of proof coins was interesting even though none of them contain silver.

Because proof half dollars are issued in sets with proof quarters, dimes, nickels, and one-cent coins, I suppose that someone removed the coins I found from their original wrapping before cashing them. So the other proof coins in those sets also probably were put into circulation. I hope other coin collectors find them before they become unpleasantly impaired (like the proof 1980 half dollar that I found).