The 45-kilometer-long Iberian-gauge mining-industrial railway line from Andorra to Escatrón (Teruel) was used to transport lignite from the mines in Andorra to the Escatrón thermal power plant on the banks of the Ebro River. This initiative by the Empresa Nacional Calvo Sotelo (ENCASO) was inaugurated in 1953 until the closure of the Samper-Escatrón section in 1978, due to the new power plant built at the mine site. Until 1984, the last coal trains with steam traction operated, which were also the last ones to use steam locomotives.
Between 1950 and 1951, the Dutch factory Werkspoor built fifty high-capacity hopper cars, and the railway workshops themselves built another six that were practically identical.
For over three decades these wagons were part of the landscape of the Andorra-Escatrón Railway. When it closed, most of them were scrapped, but three wagons were preserved (nos. 17, 29, and 53). Two are preserved by the future mining museum in Andorra, and no. 17 was donated by ENDESA in November 2023 to the Móra la Nova Railway Museum, where it has been functionally restored to the appearance it had when it first began operating in 1950.
Technical data sheet
| Any construction | 1950 |
| Constructor | Verkspoor (Netherlands) |
| Series | PTT 1 of 56 |
| Company | ENCASO (INI) - ENDESA |
| Track width (mm) | 1668 |
| Axis layout | 4 Axes |
| Length (mm) | 14.000 |
| Height (mm) | 3.500 |
| Width (mm) | 3.000 |
| Weight (kg) | 25.188 |
| Capacity | 45 m³ / 36,000 kg coal |
Client: FPPFI
Restoration Types: Functional
Any: 2025
