Many M1s have a 6-digit serial number, sometimes starting with a 0 or 1.
The Ultimate Guide to Korg M1 Serial Numbers: Dating, Authentication, and Buyer Insights Korg M1 Serial Number
Locating the serial number on an original hardware unit is straightforward, though it can sometimes be obscured by decades of use: Many M1s have a 6-digit serial number, sometimes
Every Korg M1 owner eventually faces two horrors. Your serial number predicts your risk. Korg M1 Serial Number
: A lush, atmospheric pad that showcased the unit's "AI" (Advanced Integrated) Synthesis System [6, 24].