Online Piano Apps Instantly Calculate How Old Is My Piano And Discover My Piano's Current Market Value By Accessing The Worlds Largest Piano Database. There were a limited number of grand pianos built during. Pictured below are various styles, models, and descriptions of vintage instruments that can help you determine the type and approximate age of your instrument. During the 19th and early 20th centuries, pianos and organs went through an incredible evolution. Step 1: The serial number is usually found on the plate of the piano between the bass and tenor strings. Once you know the name brand of your piano, you will need to find the serial number.
