The serial number may be stamped on the frame's wooden base, immediately under the keys. On older pianos, you may find 3-5 screws, underneath the keyslip, that need to be removed (lift up, in most cases) to view the action frame.
one or both of the cheek blocks, viewed to the right and left of the piano's keyboard. action frame (after the keyslip is removed), or stamped on Serial number is often hidden and stamped on the other side, facing the keys). keyslip (long wooden ledge, runs along the front/bottom of 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:
