Iancoleman bip39 github http://www.video-bookmark.com/user/tucanewhmt Even though it takes advantage of BIP32 method you can however import BIP39 seeds into Electrum wallet. Also apart from BIp32 There is certainly BIP44 Variation which some wallet use for that era of seeds. Press X to abort passphrase software and preserve modifying the passphrase. https://blogfreely.net/travenmdoq/create-your-own-distinct-bip39-mnemonic-expression-with-python-scripts