I'm studying the BIP39 and the seed phrase.
I can read this doc (https://en.bitcoin.it/wiki/BIP_0039) and I can find
In bitcoin talk I can read this article (https://bitcointalk.org/index.php?topic=19137) with date
June 18, 2011
I can find this post about Electrum release, https://bitcointalk.org/index.php?topic=100502.0 but i'ts just a seed not a seedphrase (or I mistake about it?)
So When did the first Wallet (and which one) implement the BIP39? Or when the user started to use it to store his keys?