If i remember correctly, you should be able to open it with a text editor and spot the coin TICKER.
But i might be mistaken, it's been 5 years since i touched a local wallet
It will work for wallet.dat which is unencrypted you can just open it with notepad or notepad++ and you will see all inside the wallet.dat including a public key and private keys.
But if it's encrypted there's no way to see them with any text editor.
@V8x8d
Can you check this one below and maybe it will work you will need a Linux Based OS.
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What alt-coins do they have (and may be how much)?Once you get the addresses you can paste one of the addresses extracted from the wallet.dat here and let us find it for you.
If the prefix of the wallet address looks the same as 1 or 3 at the beginning of the address then it is a bitcoin wallet but if it shows different prefix you might need to refer on this prefix list below.
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Altcoin PrefixesThis is not a complete list but if you can post the address maybe we can determine which altcoin that this wallet.dat belongs.