Production place
- Mauthausen, Upper Austria13 objects
- Mediolanum (ancient Milan)6 objects
- Megalopoli, Peloponnese, Greece2 objects
- Melk an der Donau, Lower Austria6 objects
- Memphis, Lower Egypt7 objects
- Merip, Klamath River, Humboldt County1 objects
- Mesa Grande, San Diego County, California33 objects
- Mesembria (historic place), Thrace1 objects
- Metapontum (historic place), Magna Graecia3 objects
- Mettmach, Upper Austria1 objects
- Mexico4 objects
- Miletus (historic place), Ionia2 objects
- Minvoul, Woleu-Ntem province, Gabon3 objects
- Missouri2 objects
- Mitroj Krsti, Polog Region, Republic of Macedonia1 objects
- Monnaie de Paris (Paris Mint), France1 objects
- Mono Lake, Mono County, California1 objects
- Monterey County, California15 objects
- Monterey Elementary School, Monterey, California1 objects
- Montreal, Quebec, Canada1 objects