Hi, thank you for your question! I have completed thousands of musical instrument appraisals and will be happy to help with yours.
Hi, "50" is not the serial, it should be 4 or 5 digits. Check inside the piano by the strings for the serial.
It will have to be 4 or 5 digits for it to be the serial. 50 may be a model number.
Ok, in that case I would be unable to provide the age without the serial number, but I can help you with value. Would that help?