Leon that's a great question. Cobb is found with an AB green back. That's the toughest back for him. There unfortunately will not be a BL or Drum back. As far as HOFers with Hindus that's unknown.
All 205's that have AB green backs will not ever have a BL or Drum back making the AB green the toughest back for them. I posted a thread a while back with Drum and Hindu possibles and confirmed. Very intersting that the counts were about the same on both sides.
Pictures are always welcome of these cards (
Leon)