Is this possible?

My mom has a DL Skymiles FF # from the beginning of the century (back when airlines would still send out physical cards to all members). She used to be a NW elite for years before stopped flying altogether. Now I am getting her back into flying.

Doubt there are miles remaining in the account. She had accrued them prior to no expiration era.

The back of the card still has Skymiles Onesource numbers.