Duplex locomotives
| 0-4-4-0 VULCAN DUPLEX DICK #144 PHOTO | 12 | 69 | 83 | RMC |
| 2-8-2--2-8-0 S REBUILDS LOCOS TO DUPLEXS | 04 | 34 | 86 | RR |
| 4-4-4-4 CLASS N1 DUPLEX B&O #5600 PHOTO | 06 | 78 | 39 | T |
| 4-4-4-4 DUPLEX CLASS N-1 B&O | 09 | 64 | 24 | T |
| 4-4-4-4 DUPLEX CLASS T1 PRR | 07 | 43 | 32 | T |
| 4-4-4-4 DUPLEX CLASS T-1 PRR 1842 | 07 | 51 | 28 | T |
| 4-4-4-4 PRR #5526 CLASS T1 DUPLEX PHOTO | 04 | 82 | 54 | MM |
| 4-4-4-4 PRR #5533 CLASS T1 DUPLEX PHOTO | 04 | 82 | 56 | MM |
| 4-4-4-4 PRR #5538 CLASS T1 DUPLEX PHOTO | 04 | 82 | 55 | MM |
| 4-4-4-4 PRR #6110 CLASS T1 DUPLEX PHOTO | 04 | 82 | 47 | MM |
| 4-4-4-4 PRR CLASS T1 DUPLEX DETAIL PHOTO | 04 | 82 | 50 | MM |
| 4-4-4-4 PRR CLASS T1 DUPLEX LOCOMOTIVES | 04 | 82 | 46 | MM |
| 4-6-2 CAMELBACK DUPLEX 444 ARTIST DRAWNG | 04 | 52 | 06 | RMC |
| 4-6-2 'DUPLEX' #444 LOCO PHOTO | 08 | 48 | 27 | RR |
| 4-6-2 'DUPLEX' CAMELBACK LOCO PHOTO | 10 | 50 | 36 | RR |
| 4-6-2 LV #444 'DUPLEX' LOCO PHOTO | 08 | 45 | 20 | RR |
| 4-6-2 LV #444 'DUPLEX' LOCO LV 1886 PHOT | 05 | 35 | 41 | RR |
| DUPLEX DRIVE LOCOMOTIVES | 10 | 60 | 61 | RMC |
| DUPLEX DRIVE LOCOS STEAMS LAST STAND | 11 | 59 | 16 | T |
| DUPLEX DRIVE LOCOS STEAMS LAST STAND ADD | 03 | 60 | 54 | T |
| DUPLEX MIKADO-TRACTOR LOCOMOTIVE CONST | 07 | 67 | 50 | RMC |
| DUPLEX STEAM LOCOMOTIVE DEFINITION | 10 | 64 | 27 | RR |
| ROSTER OF PRR 4-4-4-4 CLASS T1 DUPLEX LO | 04 | 82 | 57 | MM |
| SNO DUPLEX STEAM LOCOMOTIVES | 10 | 64 | 27 | RR |
| SNO S DUPLEX LOCOS | 05 | 44 | 74 | RR |
| STOKER: DUPLEX | 12 | 35 | 86 | RR |
| VULCAN DUPLEX CONSTRUCTION | 08 | 66 | 36 | RMC |
| VULCAN DUPLEX DCCO #144 PHOTO | 08 | 66 | 36 | RMC |
| VULCAN DUPLEX DCCO #4163 PHOTO | 08 | 66 | 37 | RMC |
| VULCAN DUPLEX DRAWING | 08 | 66 | 38 | RMC |
| VULCAN DUPLEX LOCOMOTIVES | 08 | 66 | 36 | RMC |
Duplex Locomotives sorted by Magazine
| 4-4-4-4 PRR #5526 CLASS T1 DUPLEX PHOTO | 04 | 82 | 54 | MM |
| 4-4-4-4 PRR #5533 CLASS T1 DUPLEX PHOTO | 04 | 82 | 56 | MM |
| 4-4-4-4 PRR #5538 CLASS T1 DUPLEX PHOTO | 04 | 82 | 55 | MM |
| 4-4-4-4 PRR #6110 CLASS T1 DUPLEX PHOTO | 04 | 82 | 47 | MM |
| 4-4-4-4 PRR CLASS T1 DUPLEX DETAIL PHOTO | 04 | 82 | 50 | MM |
| 4-4-4-4 PRR CLASS T1 DUPLEX LOCOMOTIVES | 04 | 82 | 46 | MM |
| ROSTER OF PRR 4-4-4-4 CLASS T1 DUPLEX LO | 04 | 82 | 57 | MM |
| 4-6-2 CAMELBACK DUPLEX 444 ARTIST DRAWNG | 04 | 52 | 06 | RMC |
| DUPLEX DRIVE LOCOMOTIVES | 10 | 60 | 61 | RMC |
| VULCAN DUPLEX CONSTRUCTION | 08 | 66 | 36 | RMC |
| VULCAN DUPLEX DCCO #144 PHOTO | 08 | 66 | 36 | RMC |
| VULCAN DUPLEX DCCO #4163 PHOTO | 08 | 66 | 37 | RMC |
| VULCAN DUPLEX DRAWING | 08 | 66 | 38 | RMC |
| VULCAN DUPLEX LOCOMOTIVES | 08 | 66 | 36 | RMC |
| DUPLEX MIKADO-TRACTOR LOCOMOTIVE CONST | 07 | 67 | 50 | RMC |
| 0-4-4-0 VULCAN DUPLEX DICK #144 PHOTO | 12 | 69 | 83 | RMC |
| 2-8-2--2-8-0 S REBUILDS LOCOS TO DUPLEXS | 04 | 34 | 86 | RR |
| 4-6-2 LV #444 'DUPLEX' LOCO LV 1886 PHOT | 05 | 35 | 41 | RR |
| STOKER: DUPLEX | 12 | 35 | 86 | RR |
| SNO S DUPLEX LOCOS | 05 | 44 | 74 | RR |
| 4-6-2 LV #444 'DUPLEX' LOCO PHOTO | 08 | 45 | 20 | RR |
| 4-6-2 'DUPLEX' #444 LOCO PHOTO | 08 | 48 | 27 | RR |
| 4-6-2 'DUPLEX' CAMELBACK LOCO PHOTO | 10 | 50 | 36 | RR |
| DUPLEX STEAM LOCOMOTIVE DEFINITION | 10 | 64 | 27 | RR |
| SNO DUPLEX STEAM LOCOMOTIVES | 10 | 64 | 27 | RR |
| 4-4-4-4 DUPLEX CLASS T1 PRR | 07 | 43 | 32 | T |
| 4-4-4-4 DUPLEX CLASS T-1 PRR 1842 | 07 | 51 | 28 | T |
| DUPLEX DRIVE LOCOS STEAMS LAST STAND | 11 | 59 | 16 | T |
| DUPLEX DRIVE LOCOS STEAMS LAST STAND ADD | 03 | 60 | 54 | T |
| 4-4-4-4 DUPLEX CLASS N-1 B&O | 09 | 64 | 24 | T |
| 4-4-4-4 CLASS N1 DUPLEX B&O #5600 PHOTO | 06 | 78 | 39 | T |