:hi: Nancy, thanks for your mail!
I had seen your inquiry about that lovely box but did not comment as I really don't know who or when, I'm afraid.
I think it is pressed, you need a mould for such a decor. But for a shallow bowl like this lid, the mould could be of one piece and consequently show no seams at all. Or, of course, as Sue said, seams have been removed by either fire polishing, acid or grinding.
I don't think your box and my ashtray
are related, I only think that both could probably originate from USA?