Antique Blue Milk Glass Plate

Vintage antique Challinor Taylor lace edge blue milk glass plate. Apparently from the 1800s. Very good condition. The lattice sides have some small cracks which is pictured, but it is still very strong and durable. The middle of the plate has a dark spot surrounded by a light ring, which I’m guessing was from when the plate was being made. There also appears to be dust in the middle, but it’s a spot in the glaze. About 8” across