The Korg M1 (1988–1991) is one of the most influential digital synthesizers and music workstations of the late 20th century. Its distinctive sounds — the famous “M1 Piano,” organ patches, and evolving pads — defined countless recordings across pop, dance, house, and film music. Serial numbers for M1 units are a small but important detail for collectors, restorers, and historians: they help verify manufacture date, factory origin, authenticity, and sometimes the hardware revision or regional distribution.
Placement: Look near the MIDI ports or the power input. It is usually printed on a small adhesive sticker or a metal plate. Korg M1 Serial Number
The most significant distinction in Korg M1 serial numbers is identifying units manufactured before the "Heat Issue" fix. Korg M1 Serial Number The Korg M1 (1988–1991)
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, Korg Italy (formerly Sisme) , 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." Back or Bottom Panel : Look for a
Unlike earlier Korg models that used year-based prefixes, the M1 belongs to the "Just Numbers" era of Korg production (post-1983).