Bip39 format example https://files.fm/u/2eemhhak2q#design Though it uses BIP32 process it is possible to nonetheless import BIP39 seeds into Electrum wallet. Also in addition to BIp32 there is BIP44 Model which some wallet use for that era of seeds. The BIP39 word list is actually a set of two,048 carefully decided https://echobookmarks.com/story20771155/bip39-dotmap-about-bip39-2048-words-https-x-com-tundra838554