What is the age of a baby grand piano Marshall and Wendell serial number 115001?

To determine the age of a Marshall and WenDELL baby grand piano with the serial number 115001, you can refer to the manufacturer's production records. Generally, Marshall and WenDELL pianos were produced in the early 20th century, and serial numbers in the range of 100,000 to 120,000 often date from around 1910 to 1920. Therefore, it's likely that this piano is approximately 100 to 110 years old. For a more precise dating, consulting a piano expert or historical records would be beneficial.