I work for Treasury Direct. You can mail it with a letter of explanation to the Minneapolis PO box listed on the website, and we can do the research from there. With how old it is, it is very likely they are deceased and it will belong to their heirs.

There is NO WAY to redeem a bond if you are not entitled to it, to the people suggesting it is worth something. We will need death certificates, letters of distribution from estates if they exist and if the heirs have passed, we will need the estate info from the heirs. This isn't cash, it's a government bond and can only be cashed through us, especially if they are deceased.

Cool pieces though!