Japan Production - Grand - Upright - Grand - Upright - Grand - Upright U. Serial numbers for different models are not always sequential, so actual date could vary. Grand Pianos.The serial numbers listed below are the approximate first number for each year. Pianos Manufactured in Jakarta, Indonesia. Year of Manufacture Serial Number Upright Pianos Grand Pianos Pianos Manufactured in Hangzhou, China. If your grand piano is any other model, it was manufactured in Hamamatsu, Japan. If the serial number begins with 'J'the piano was manufactured in Jakarta, Indonesia. If the serial number begins with 'YT'the piano was manufactured in Taoyuan, Taiwan. Piano Buyer: How to Find the Serial Number of Your Piano If the serial number begins with an 'H'the piano was manufactured in Hangzhou, China. If the serial number begins with a 'U'the piano was manufactured in South Haven, Michigan. If the serial number begins with a 'T'the piano was manufactured in Thomaston, Georgia. The serial number can be seen by opening the toplid of the piano and looking inside.
