Copied from the Mary Rose, Vasta, or from local museums, plates can be made flat backed or shaped and I show both in the picture. Flat backed plates double as chopping boards when flipped over and they sit flat on a table. They are more sturdy but a little heavier than the shaped plates. Shaped plates are more common on ships and are more easily eaten from on laps.
Plates were made from many different kinds of woods apart from the obvious exceptions of oak and ash but were most commonly made from beech, maple or Yew. Mine are made from beech but I can make them from other woods.