I've replied.

The only vaguely "official" mention, ever of the "Seawood" name was on that thread on the IoWSG forum.
It came from David Tolley, who had asked Elizabeth Harris about it, but I don't know what words she used.
It
might have been mentioned as Seawood on the Archive site when I bought these bits, which would have been why I was querying, and
it might well have been a typo there.
It wasn't ever used
officially, and I think it should be allowed to die.
These strapped pieces are simply early experimental things, which, when simplified, led to Aurene.