What is the age of a parlor grand piano Marshall and Wendell serial number 9403?

To determine the age of a Marshall and WenDELL parlor grand piano with the serial number 9403, you can refer to the serial number charts specific to the manufacturer. Generally, Marshall and WenDELL pianos were produced from the late 1800s to the early 1900s. Serial number 9403 likely indicates that the piano was built around the early 1900s, possibly between 1900 and 1910, but for an exact year, consulting a detailed piano registry or expert would be beneficial.