How old is a baby grand piano made by De Koven serial?

To determine the age of a baby grand piano made by De Koven, you will need to look for the serial number, which is usually located on the inside of the piano. The serial number will consist of a combination of letters and numbers. Once you have the serial number, you can contact the De Koven piano company or visit their website to find out more information about the age of your piano.