| Builder | Ringhoffer Werke Smichov (AP St.Polten) |
| Year built | 1913 |
| Previous numbers | kkStb et BBö 31497, DR 205 606, ÖBB Bi 36 271, BT 7139.013, 84 VVT |
| Rebuilt | (1958 to diagram 31 149.01) |
| Number of seats | 52 second class |
| Weight in working order | 16 / 18t |
| Brakes | O-GP 15 / 18 t |
| Length over body | 13.80 meters (45 feet 3 inches) |
| Maximum speed | 40 km/h (22 mph) on the VVT / 80 km/h (44 mph) in Austria |
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After the second world war, to accommodate the needs of ÖBB passengers, freight wagons in good condition were rebuilt with steel passenger standard bodies. For thirty years these represented the typical Austrian local train. Until these passenger and brake passenger carriages were sold to preserved railways and museums these twin axled carriages were in regular service.
On the 20th November 1984, three passenger carriages as well as one brake passenger carriage (BD2), planned as a sales area for souvenirs, were rescued by the VVT and arrived at St-Sulpice.
| Rebuilding | Work during the spring of 1985 | B2 334 2003 |
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This vehicle is in service between St-Sulpice and Travers.
http://www.voisin.ch/vvt/ : 13.07.2006