Korg M1 Serial Number -

No. The "Piano 8" card (M1R-1) was an aftermarket ROM. However, if your serial is M1EX-XXXXX, the card came built-in. All other serials require you to open the expansion bay to check.

If you are selling your M1, the serial number should be the third line in your ad (after "Working" and "No smell"). Korg M1 Serial Number

Pro Tip: A working M1 with a dead internal battery (the "Please install battery" error) is worth about $100 less regardless of serial number. Fixing this requires soldering. Pro Tip: A working M1 with a dead

These units (produced late 1989 to early 1990) represent the "sweet spot." Korg released the M1EX

Format Example: M1EX-87654

In 1991, Korg released the M1EX, which included the PCM expansion card pre-installed. These serial numbers are distinct.