When was bip39 introduced https://josueaqpi312.huicopper.com/leading-5-online-bip39-generators-for-easy-copyright-security Even though it works by using BIP32 process it is possible to still import BIP39 seeds into Electrum wallet. Also apart from BIp32 There may be BIP44 version which some wallet use to the era of seeds. BitBox02 - A successor into the BitBox sequence, https://thebookmarkid.com/story20631238/bip39-history-everything-about-bip39-word-list-txt-https-www-youtube-com-channel-ucupxfytj0fb78sq55hu6ocw