Quote Originally Posted by Paulbot View Post
Check the link I posted anyway. The thirteen original Transformers are a Simon Furman add on from some BotCon fiction that Hasbro is running with. There's timelines for various timelines but as is often the case with your questions there is no "one source", no "one timeline"... Except this new "aligned" continuity which is supposed to provide that going forward.
Cheers Paulbot.

Yeah, it's a good starting point. I just wish it had specific times instead of 'long ago' and the like :P