Hello all! I have been presented with an item that, frankly, has me stumped. It was recovered twenty years ago from the bottom of the St. Lawrence River near Prescott, by a diver. It is an earthenware disc, glazed (on one side) and marked "MAISON DORIN" "27. R. Grenier St.Lazare PARIS" in a circle, with a trademark in the middle bearing an obscure date (1795?) and the words "??RD // DE // TOI // ETTE", around a monogramme of the name "DORIN" in the centre, and the words "MARQUE DE FABRIQUE" underneath. The disc is 56 mm in diameter and 6 mm thick. It has a number of raised concentric rings on the back. I would sure like to hear from anyone who can tell me what this is, how old it is, and, perhaps, something about the company. Thanks a lot in advance for any and all assistance. Chris Andersen [log in to unmask] <<...>> <<...>>