Those are some nice notes you have there. The $10 silver certificate is a nice note, and the $20.00 star note is probably pretty valuable as well. I'm not expert, but I'm sure they will chime in soon enough! Great finds, and good thinking holding on to them!
Yes, very nice finds. The 1928 $20 is a 'numeral note' as the Federal Reserve seal has the numeral as opposed to the letter designation. The SC $10 and the *-$20 are really nice too. The '34A $10 is a great circulation find too but unfortunately they don't really bring that much when sold.