Trucks: B-B (Light swing bolster, Model MT-5050)
Engine: 12-251B, 1,800 hp
Gear ratio: 74:18
Maximum speed: 65 mph
Operating weight (lbs.): 266,790
Tractive effort (lbs.): 44,000
Dynamic brake: Yes
Length: 56′ – 11 3/4″
| Road no. | Class | Build date | Builder’s no. | Retired | Notes / disposition |
| 3600 | MR-18a | Aug 56 | 81934 | Jun 16 88 | To Genesee Valley Railroad No. 3600 Mar 8 88, to Depew, Lancaster & Western No. 3600 Aug 89, to Delaware – Lackawanna Railroad No. 1800 |
| 3601 | MR-18a | Aug 56 | 81935 | Jun 16 88 | To Lamoille Valley Railroad for parts Mar 8 88, to display by private owner Richford VT |
| 3602 | MR-18a | Aug 56 | 81936 | Nov 87 | Scrapped |
| 3603 | MR-18a | Aug 56 | 81937 | Nov 88 | To Genesee Valley Railroad for parts Oct 89, to Delaware, Lackawanna & Western No. 1803, Scrapped |
| 3604 | MR-18a | Sep 56 | 81938 | Jun 16 88 | To Genesee Valley Railroad Jun 16 88, to Depew, Lancaster & Western No. 3604, to Depew, Lancaster & Western No. 1804 |
| 3605 | MR-18a | Sep 56 | 81939 | Oct 88 | To Genesee Valley Railroad Jun 16 88, to Winchester & Western Oct 88, to IBOX No. 605, scrapped |
| 3606 | MR-18a | Sep 56 | 81940 | Oct 88 | To Quabog Transfer No. 3606, to Winchester & Western Oct 88, to Wimpey Materials Mar 91, scrapped |
| 3607 | MR-18a | Sep 56 | 81941 | Jul 85 | Scrapped Jun 85 |
| 3608 | MR-18a | Sep 56 | 81942 | Mar 8 88 | To Lamoille Valley Railroad No. 3608 Mar 8 88, scrapped |
| 3609 | MR-18a | Sep 56 | 82026 | Dec 79 | Wrecked Aug 79, scrapped at St. Albans VT |
| 3610 | MR-18a | Sep 56 | 82027 | Jul 85 | Scrapped Oct 85 (St. Albans VT) |
| 3611 | MR-18a | Sep 56 | 82028 | Oct 88 | To Quabog Transfer No. 3611, to Winchester & Western Oct 88, to Miller Milling (Winchester VA), to Delaware – Lackawanna No. 1805 |
| 3612 | MR-18a | Sep 56 | 82029 | Mar 8 88 | To Lamoille Valley Railroad Mar 8 88, to Petromont (Montreal East QC) Feb 95, to York-Durham Heritage Railway No. 3612 |
| 3613 | MR-18a | Sep 56 | 82030 | Nov 87 | Scrapped Swanton VT Nov 89 |
| 3614 | MR-18a | Sep 56 | 82031 | Aug 86 | Scrapped St. Albans VT Sep 86 |