"Pioneer First" was built in 1892 as a 12 wheeled first class clerestory roofed corridor with end-loading platforms and side swing doors. Originally classified as "AA" class it carried the name Pioneer on the letterboard, probably after 1896. It contained eight compartments, each with a sliding door to an enclosed corridor and a swing door to the outside.
In 1921 it was altered to second class and coded "12 BL", with a capacity of 64. Carriage "12 BL" was stored at Steamrail depot, Nth Williamstown in May 1987, in a very poor state of repair.
| 1892 | Entered service. |
| 6.9.1921 | Altered to second class and coded "12 BL". |
| 1962 | Withdrawn |
| 3.1968 | Returned to traffic named Enterprise. |
| - | To Steamrail. |
