No chips, cracks or scratches. I do not see a signature of the artist on the front.
The back has the incised KPM mark with the scepter over it. There are three other marks underneath, an N, S and 3. There is also a paper label as seen in the pics. It measures 7 3/8 diameter. The item "Antique KPM Porcelain 1837-1844 Hand Painted Marie Antoinette Portrait Plaque" is in sale since Monday, February 8, 2021.This item is in the category "Antiques\Decorative Arts\Ceramics & Porcelain\Other Antique Ceramics". The seller is "andrewshane" and is located in Conway, Arkansas. This item can be shipped to United States, Canada, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, China, Sweden, South Korea, Indonesia, Taiwan, South africa, Thailand, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Bahamas, Israel, Mexico, New Zealand, Singapore, Switzerland, Norway, Saudi arabia, Ukraine, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Malaysia, Brazil, Chile, Colombia, Panama, Jamaica, Barbados, Bangladesh, Bermuda, Brunei darussalam, Bolivia, Ecuador, Egypt, French guiana, Guernsey, Gibraltar, Guadeloupe, Iceland, Jersey, Jordan, Cambodia, Cayman islands, Liechtenstein, Sri lanka, Luxembourg, Monaco, Macao, Martinique, Maldives, Nicaragua, Oman, Peru, Pakistan, Paraguay, Reunion, Viet nam, Uruguay.