This series of vehicles was built between 1946 and 1960 in France because the Spanish industry did not have enough capacity to deliver them quickly. The numbers AA-6018, 6034, and 6037 date from 1951, built by the Saint-Denis company (Paris). They were first class, with compartments, very comfortable, and featured a side corridor. In the mid-sixties, with the appearance of the 8000 series of German descent, they began to be relegated to regional services until the end of the following decade, when new groups of rolling stock with more suitable equipment, the 5000 and 6000, arrived and they began to disappear.
In 1987, a group of six vehicles was converted by Tallers Rocafort in Lleida into unique saloon cars with a central aisle, new interior design with 2+2 row seating of the 9000 type and a capacity of 56 seated places, intended to form charter trains or to reinforce other trains, receiving a new numbering with the prefix B7. Their exterior decoration was a green, white, and red color scheme, which is why they became known as the Luckies, because they resembled the appearance of the well-known Lucky Strike tobacco brand.
With this new appearance, they began operating as a tourist train in various parts of Catalonia—Vic, Ripoll, Blanes, and with the Ara Lleida with steam traction, a predecessor of the current Lake Train. During the summer season, on weekends they operated specials between Barcelona and Tortosa.
Later, in 1992, they were assigned to UNE de Regionales, where they were equipped with Minden-Deutz bogies and a white and orange livery with oblique stripes at the ends. Three years later they were transferred to the Museo Nacional Ferroviario, adopting an olive green color with yellow stripes, and since then their base has been Can Tunis (Barcelona), continuing to be used for some commemorative trips, until on October 15, 2015, the Fundación de los Ferrocarriles Españoles transferred coaches B7-6218, 6234, and 6237 to the Railway Foundation of Móra la Nova (FPPFI), where they have recovered their original appearance and initial registration numbers and will be coupled with the already restored CC-6029 and 6043 and will be part of the tourist train Lo Caspolino.
Technical data sheet
| Any construction | 1950 |
| Constructor | Saint-Denis (Paris) |
| Series | 5000/6000 |
| Company | RENFE |
| Track width (mm) | 1.668 |
| Axis layout | 4 Axes |
| Length (mm) | 21.300 |
| Height (mm) | 4.300 |
| Width (mm) | 3.100 |
| Weight (kg) | 39.700 |
Client: FPPFI
Restoration Types: Functional
Any: 2022
