Instructions
Determine what style of rocking chair you own. Some of these would include Colonial, Louis XIV, XV, or XVI, Chippendale and Art Nouveau among many others. The style is important since many manufacturers and designers were best known for crafting only one style. So if a designer was popular for a Regency, it is most likely that he would not build a Jugendstil style of rocking chair.
Locate the manufacturer's mark. They can be found in different forms, including as a label that has been pasted on with information written in pencil or ink, branded on with a hot iron or stamped on with a steel die. Certain practices are attributed to specific regions and nationalities of the world and may also help in tracing a chair's origin. In almost every instance, the mark will be found on the underside of the seat with as much information as was the norm at the time of manufacture.
Consult an appraiser with the label or stamp found underneath the chair. Take a photograph of the mark and scan or fax it to an expert. Many of them have reference books cataloging all of the marks of antique furniture makers throughout history. There are also some sources on the Internet that can be found, although in many cases, their references may be incomplete.