A small white or silver sticker typically located on the back of the unit, often near the MIDI ports or power input.
While the vast majority of M1s bear a standard Japanese serial number (often printed on a white or silver sticker), a notable subset exists with a different format. These are the units assembled in Italy by Korg’s then-distributor, , to meet overwhelming European demand. These Italian-made M1s often have serial numbers with an "I" prefix or a different numeric range, and they typically lack the "Made in Japan" stamp on the rear panel, instead reading "Made in Italy" or "Assembled in Italy." Korg M1 Serial Number
Based on our research, here are some approximate serial number ranges and corresponding production dates: A small white or silver sticker typically located
These are the first 20,000 units shipped from the Korg factory in Japan. If you see the "M1-" prefix, you have a very early unit. These Italian-made M1s often have serial numbers with
Here is helpful content regarding Korg M1 serial numbers, including how to find them, what they mean, and how they affect repair and value.
The serial number label will also tell you where the unit was manufactured.