For Class 145 also see Class 104
| Vehicle type: | DMBSL | DTCL |
| Classification: | 103 | 103 |
| Original classification: | 103 | 145 |
| Original number range: | 50395-50414 | 56150-56169 |
| Revised number range: | - | - |
| Classification: | DMBSL | DTCL |
| Introduced: | 1957 | 1957 |
| Built by: | Park Royal Vehicles | Park Royal Vehicles |
| Vehicle length (over body): | 57ft 6in | 57ft 6in |
| Height: | 12ft 4 1/2in | 12ft 4 1/2in |
| Width: | 9ft 3in | 9ft 3in |
| Seating: | 52S | 16F/48S |
| Internal layout: | 2+3S | 2+2F/.2+3S |
| Gangway: | Inner end | Inner end |
| Toilets: | 1 | 1 |
| Weight: | 33 tons 8cwt | 26 tons 7 cwt |
| Brake type: | Vacuum | Vacuum |
| Power unit: | 2 x BUT (AEC) of 150hp per vehicle | - |
| Horsepower (total): | 300hp | - |
| Transmission: | Mechanical | - |
| Max speed: | 70mph | 70mph |
| Coupling type: | Screw | Screw |
| Multiple restriction: | Blue square | Blue square |
| Door type: | Slam | Slam |
| Special features: | ||
| Body structure: | Alloy and Steel | Alloy and Steel |
| Notes: |