We need more facts.
A quick google seach reveals this web page:
http://www.uspapermoney.com/worth.html which says: " Did you know that a 1966 $100 bill is typically worth FAR more than a 1934 $100 bill? "
And this Web Page (
http://www.rrcoins.net/Q&A.htm) which says: "I have a 1934 D Series $100 FRN and am curious as to its value. I see you have an H series posted for sale but can not read the sale price. If you could respond I would greatly appreciate it. I might be interested in selling this bill and would also like to know the best way to go about selling currency. Thank you.
I suspect that you have a small monitor and will need to move or shift your screen to the right in order to see my prices. (There's a bar at the bottom or your window.) Your note is worth $105 in very good condition and $125 in crisp uncirculated condition."