One can identify an old porcelain doll by examining its material, as porcelain dolls were commonly made in the 19th and early 20th centuries. Look for signs of wear and aging, such as cracks, chips, or discoloration on the doll's surface. Additionally, check for any markings or labels on the doll that may indicate its manufacturer or origin, as this can help determine its age and value. Finally, consider the doll's style and design, as older porcelain dolls often feature intricate detailing and craftsmanship that may differ from more modern dolls. **

To identify porcelain plates from Rosenthal, look for the Rosenthal logo on the back of the plate. The logo typically includes the word "Rosenthal" along with a crown symbol. Additionally, Rosenthal plates are known for their high-quality porcelain material, which is usually thin and translucent. The design of Rosenthal plates often features modern and elegant patterns, making them distinctive and easily recognizable. **

To help identify the porcelain stamp, it would be helpful to provide a clear photo of the stamp and any other markings or patterns on the porcelain. Additionally, information about where the porcelain was acquired or any known history about its origins could also be useful in identifying the stamp. Posting the photo and any relevant information on a forum or website dedicated to porcelain identification may also help in getting assistance from experts or enthusiasts in the field. **

The porcelain or ceramic soup bowl is worth $15. **

Of course! I would be happy to help you identify a porcelain maker's mark. Please provide me with a clear image of the mark, including any symbols or letters, and I will do my best to research and identify the maker for you. Additionally, any information you have about the origin or history of the piece may also be helpful in identifying the maker. **

To identify the porcelain mark with crossed wheat, you would first need to carefully examine the bottom of the piece for the mark. The mark typically consists of two crossed wheat stalks with a crown or other symbol above them. Once you have located the mark, you can research it online or in reference books to determine the manufacturer and time period of the piece. Additionally, you can consult with antique experts or appraisers for further assistance in identifying the mark. **

An immersion heater can be safely placed in a metal container, as long as the metal is non-corrosive and can withstand the heat generated by the heater. However, it is not safe to place an immersion heater in a plastic container, as the heat can cause the plastic to melt or release harmful chemicals. It is important to always check the manufacturer's guidelines and recommendations for the specific immersion heater being used to ensure safe and proper usage. **

An antiques appraiser or a specialist in porcelain and ceramics would likely be able to identify the porcelain mark, potentially with the manufacturer and age. They would have the expertise and knowledge of different porcelain manufacturers and their marks, as well as the ability to determine the age of the piece based on various factors such as the style, materials used, and production techniques. Additionally, there are online forums and communities dedicated to identifying and appraising porcelain marks, where knowledgeable collectors and experts may be able to provide insights and information. **