| -M- | |
| Macau | Montenegro |
| Malagasy | Morocco |
| Malaysia | Morocco Agencies |
| Maldive Islands | Mozambique |
| Mali | -N- |
| Malta | Namibia |
| Marshall Islands | Netherlands |
| Mauritius | Netherlands Antilles |
| Mayotte | Nevis |
| Memel | New Caledonia |
| Mesopotamia (Iraq) | New Zealand |
| Mexico | Nicaragua |
| Monaco | Niger |
| Mongolia | North Borneo |
| Norway |
Promoting collecting lighthouses on stamps and related items
