| Id | Nazwa wytwórcy | Sygnatury | Guziki |
|---|---|---|---|
| 36 | M & S (Berlin, Birmingham) | M & S | 15 |
| 637 | M = М | M = М | 1 |
| 642 | MAC LEOD | MAC LEOD | 1 |
| 49 | MAEDICKE J.C. (Berlin) | ICM; MAEDICKE | 59 |
| 393 | MAGNUS | MAGNUS | 11 |
| 315 | MAHER | MAHER | 1 |
| 483 | MALDEREN | MALDEREN | 2 |
| 547 | MALTESER | MALTESER | 1 |
| 628 | MANCLARK | MANCLARK | 1 |
| 487 | MARTIN | MARTIN | 1 |
| 163 | MASS | MASS | 6 |
| 44 | MASSE | MASSE | 9 |
| 227 | MAX SEEHAGEN | MAX SEEHAGEN | 2 |
| 665 | MAYWALD | MAYWALD | 2 |
| 89 | MB | MB | 2 |
| 443 | MCGOWAN | MCGOWAN | 2 |
| 269 | MD | MD | 3 |
| 3920 | MERRYWEATHER | MERRYWEATHER | 1 |
| 3689 | METAL SPECIALTIES Co | METAL SPECIALTIES Co | 1 |
| 22 | MEYER | MEYER | 10 |
| 354 | MGS | MGS | 1 |
| 4106 | MGW (Warszawa) | 0 | |
| 293 | MI | MI | 1 |
| 3998 | MICHAUD & DALY | MICHAUD & DALY | 1 |
| 399 | MIERNOWSKI | BM VERSAL PRIMO; MIERNOWSKI | 3 |
| 62 | MILANO | MILANO | 1 |
| 643 | MILLER | MILLER | 1 |
| 45 | MILLER RAYNER & HAYSOM | MILLER RAYNER & HAYSOM | 5 |
| 3670 | MILNS | MILNS | 1 |
| 372 | MK | MK | 1 |
| 475 | MM | MM | 1 |
| 31 | MM = ММ | MM=ММ | 4 |
| 479 | MN | MN | 1 |
| 553 | MOCKOU | MOCKOU | 1 |
| 73 | MOHR & SPEYER | MOHR & SPEYER | 4 |
| 422 | MOOS | MOOS | 1 |
| 140 | MORTON & CROWDER (Birmingham) | MORTON & CROWDER | 3 |
| 3767 | MOSCAU | MOSCAU | 2 |
| 221 | MOSKWA = МОСКВА | MOSKWA = МОСКВА | 1 |
| 317 | MOSSZTAMP = МОСШТАМП | MOSSZTAMP = МОСШТАМП | 10 |
| 253 | MOTZ | MOTZ | 7 |
| 620 | MRT | MRT | 1 |
| 154 | MS | MS | 10 |
| 331 | MSS | MSS | 3 |
| 379 | MSSAG | MSSAG | 1 |
| 23 | MULLER | MULLER | 1 |
| 9 | MUNCHHEIMER | MUNCHHEIMER | 6 |
| 13 | MUNCHHEIMER ? | MUNCHHEIMER? | 514 |
| 7 | MUNCHHEIMER LUDWIK | MUNCHHEIMER LUDWIK | 2 |
| 457 | MUNCHHEIMER LUDWIKA | MUNCHHEIMER LUDWIKA | 0 |