On the piano’s cast iron plate, near the tuning pins, as you face the keys.Located on the right, this acts as a 'bridge' to the 'beams' of the cast iron plate. Note: You may have to remove the (1) music desk first and then (2) gently clean out any dust from your piano's plate before these numbers can be found. Here are the TOP FIVE places to locate the serial number of your BABY GRAND or GRAND piano:
