Help with old bearer bond

I’m trying to research this old euro bearer bond issued in 1985 and I’ve hit a brick wall.

I’d appreciate anyone’s assistance researching the value, if any, of this debt instrument.

The specifics:

Hercules, Inc. 10 1/8% bearer bond due 1992 Issued in 1985 Ashland Global bought Hercules in ‘08 in an asset and stock sale. No debt was discharged that I can find..

Trustee: Marine Midland Bank (now HSBC) and Banque General du Luxembourg (BNP Paribas)

I have several of these and can’t seem to find if they are still redeemable.

Any help would be appreciated!!!