Unlike some manufacturers, Korg didn’t use a straightforward “YYMMDD” system. However, a clear pattern exists based on cumulative production.
Similar to the keyboard, the sticker is usually placed on the back panel . Korg M1 Serial Number
| Part | Low Serial (M1- / 171xxxx) | High Serial (174xxxx+) | | :--- | :--- | :--- | | | Non-backlit (16 pin) | Green backlit (14 pin) | | Key Weight | 55g lead weights (heavy) | 45g zinc weights (light) | | Power Supply | Discrete transformer | Switching supply (different fuse) | | Output Jacks | Soldered directly to board | Wired with a ribbon cable (more durable) | | Part | Low Serial (M1- / 171xxxx)
: Look near the MIDI ports or the power input. It is usually printed on a small adhesive sticker or a metal plate. Unlike some manufacturers