I've not seen one of these before either, but they did experiment with goblets a bit.
The broken pontil scar is simply because it is on the foot of the goblet. Goblets all tend to have that.

In answer to your question, yes. But I can't say exactly how early. I'd suspect towards the later end of early rather than the early end...

The bowl has a few surface ribs - probably from the same mould as was used for the little jugs the Boffos made.