Where would you find a serial number on a hohner accordion?

On a Hohner Accordion, the serial number is typically located on the back of the instrument, often near the bottom or on the side panel. In some models, it may also be found inside the bellows or on the keyboard. It's usually stamped or printed on a label, making it easy to identify. If you're having trouble locating it, consulting the specific model's manual can also help.