How to extract the seed phrase from a wallet DAT file?

I seem to have the opposite problem of similar posts: I found an old .dat file on a backup drive (seems to be binary), around 90 KB, from 2013 or earlier, and its name tells me that it's a Bitcoin wallet. I assume that it contains the private key so I could theoretically check the status.

Is it possible to extract the seed phrase so that I can use that wallet in another app? I was already searching if I could import the .dat file directly, but couldn't find any app that would allow me to do that. In general, I'd prefer to use a non-custodial solution.

Any instructions would be appreciated!



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