I might be going out on a limb, but none of my reference books have anything about this pattern or mark. Therefore, I am going to consider it rare. The plate measures 9" in diameter. It is transfer printed in light blue with a romantic landscape with a bridge over a river, 2 men in a boat, and buildings in the distance. Of course there is the traditional tree. The border has a combed line design with Gothic points going into the bowl of the plate. The bottom is marked with a crown with Rock Stone above and Malta below. I would assume the Rock Stone is the name for the ironstone and Malta is the pattern name. I do not know who made it but I would identify this as 19th century Staffordshire. There are no chips or cracks. There is crazing. I have 4 of these plates available. 2 are without chips or cracks. The other 2 have multiple edge chips and would be available at a lower price. The price is for a single plate in good condition.