One has a finer hand in painted details and blue scale. Dark marks on back of both dishes. One has more dimpling than the other on the backside. No known chips or cracks. We are not experts but believe these to be 18th Century Worcester porcelain plate Dr Wall c 1770.
We have only lightly wiped and leave further cleaning to a expert. Approximate size: 8 in diameter. 4.5 diameter foot rim base. We look forward to working with you.