Some later units simply include the year in the first two digits (e.g., 90XXXX would imply 1990).
Look for a small black sticker on the rear metal chassis.
Origins and production context
The serial number on your Korg M1 is much more than an inventory tracking code; it’s the instrument’s DNA. From revealing its approximate date of birth in the late 80s or early 90s to confirming its authenticity and increasing its market value, this simple string of digits is a powerful tool for any owner or buyer.
: Identifying specific production batches if you need replacement parts or internal battery servicing. Korg M1 Serial Number
Later models often possess higher 6-digit sequences, reflecting the total of 250,000 units sold by 1995. Key Observations from Serial Number Data
If you buy a low-serial-number M1, press the internal button combination at startup to check the firmware version. If it is running an early firmware version, you can buy upgraded ROM chips online to flash it to the final version. Some later units simply include the year in
The serial number can be an unexpected hero when you need to restore your Korg M1 to its original factory state.
Korg placed the serial number in two locations on the M1: From revealing its approximate date of birth in
While the serial number tells you when it was made, you can also check the (OS) of your M1, which is important for identifying if your unit has the final, most stable software. How to check M1 firmware: Turn OFF the power. Press and hold the [INT] button. Turn the power ON while holding [INT].
The peak of production. These units usually feature the most stable firmware (Version 1.9 or higher).