Hornby R3728 BR Class 21 Pug 0-4-0ST 51207 - Era 4
| Length | 85mm |
| Period | Era 3 (1923 - 1947) |
| Operator/Livery | Early BR Black |
| Class | Class 21 'Pug' |
| Designer | Sir John Aspinall |
| Entered Service | 1893 |
| Minimum Curve | R1 |
| Age Suitability | 14+ |
| Motor | Type 7 |
| Wheel Configuration | 0-4-0ST |