Trucks: A1A-A1A Flexicoil
Engine: 12-567, 1,200 hp
Gear ratio: 63:14
Maximum speed: 60 mph
Operating weight (lbs.): 221,300 – 222,620
Tractive effort (lbs.): 40,000
Length: 55′ 2 1/2″
| Road no. | Class | Build date | Builder’s no. | Retired | Disposition |
| 900 | GR-12a | Dec 52 | A303 | Dec 17 86 | To display Clarenville NL |
| 901 | GR-12a | Dec 52 | A304 | Dec 17 86 | |
| 902 | GR-12a | Dec 52 | A305 | Dec 17 86 | To display Lewisporte, NL |
| 903 | GR-12b | Jan 53 | A435 | Dec 17 86 | |
| 904 | GR-12b | Jan 53 | A436 | Dec 17 86 | |
| 905 | GR-12b | Jan 53 | A437 | Dec 17 86 | |
| 906 | GR-12b | Feb 53 | A438 | Dec 17 86 | To display St. John’s NL |
| 907 | GR-12b | Feb 53 | A439 | Dec 17 86 | |
| 908 | GR-12b | Feb 53 | A440 | Dec 17 86 |