If you have a look through the wallet.dat in a normal text editor... you should be able to find various "name" fields. These will be followed by the address in plain text... here is an example of a Dogecoin wallet:


You can see the addresses start with a "D", which is a clue that it is a dogecoin wallet.dat.

So, try opening the file in a text editor and see if you can find some addresses to see what coin it is... It may not be worth your while attempting to recover the contents if it's a dead or worthless coin.


NOTE: as always, make sure you have backups of the original wallet.dat file, and only work on copies... you don't want to take the chance of accidentally corrupting the original wallet.dat!