Hi mate,
My E came from a watchmaker who bought up a bunch of old stock from a guy selling his business as he was retiring. He found my E amongst the rubble. In it's original case with VHS Tape

Tester, Screwdriver & all paperwork, and we even did the transfer too Breitling together.
My E, OK I, had a bad fall and the E got damaged. After an £800 insurance claim it came back like new, but no provenance on the watch was ever produced. This in the UK.
Thing that still makes me grin is the screwdriver.
I guess Breitling don't make time to give a little history. Not any profit in it.
I guess there will never be. Sad isn't it.
Davey