Nah, flat or with a small lip, some where square , which is the sort that's been churned out for the ye olde feast market but looking at them in paintings etc round ones were much more common. They seamed to die out in the 17th C , early 18th.
Some good pics here
https://en.m.wikipedia.org/wiki/Trencher_(tableware)
ATB
Tom
Some good pics here
https://en.m.wikipedia.org/wiki/Trencher_(tableware)
ATB
Tom
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