How to verify or research an M1 serial number
: Verifying the unit is a genuine 1988–1995 original. Korg M1 Serial Number
The serial number is typically found on a black sticker located on the rear panel of the synthesizer, near the audio and MIDI connectors. How to verify or research an M1 serial
The serial number is often relevant when performing maintenance or upgrading firmware. To check your M1's internal software version: Turn the power . Press and hold the [INT] button. Turn the power ON . Korg M1 Serial Number