Jo,
I tried to turn in a couple of the older $10 strikes at Fitzgeralds downtown. Last spring and they would not take the older strikes. I called a cage superviser over. And she verfied this. She said that they had already done the required redemprion period on these.
That was before they got the new style slot machine. Maybe they will take them now that they have a strike machine now, I donot know.
Dan