My thanks to everyone for your help. I am going to try to find a local expert - if I can find one - and ask them to examine the notes and I’ll take it from there.

The other prefixes are EHF6053688,EHC 251010, EHF 6053687
Thanks again

Thank you. That was helpful.

Years ago my aunt in Canada received money in 1975 $50 bills from her bank which she did not use. She gave 10 to me. They were unfolded and pristine when I got them and I have kept them in sleeves. 6 of them are consecutive EHE 3852017 - 3852022. I don’t know anything about worth or anything about t...