Bip39 format https://www.anobii.com/en/01000289012ff9b293/profile/activity While it works by using BIP32 strategy it is possible to continue to import BIP39 seeds into Electrum wallet. Also apart from BIp32 There's BIP44 version which some wallet use for your technology of seeds. BitBox02 - A successor towards the BitBox collection, this components wallet supports https://papaly.com/1/eMEf