Could be a "seconds" mark, not sure. There is a very small dark spot on the rim, possible firing flaw.
See last photo - The plate is overall in lovely condition with no chips cracks or other evidence of use. Please see all photos as they are part of the description. I strive to inspect, describe, and photograph my items carefully and accurately. If you are unhappy with an item, please contact me so we can work something out, other than a return. We pack with extreme care, but If the item arrives damaged in transit, please take a photo of the item AND the packaging and send it to us immediately.