MP 4120
This loco was built in 7/1950 with EMD serial number 11553. She was built as a freight roadswitcher, model GP7.
She was renumbered to MP 135.
She was one of five MP GP7's (along with MP 4117, 4119, 4122 & 4123) to receive an extra seat in the nose for a fifth crew member and an extra set of number boards mounted below the original ones. The modifications were done around 1953. It is not know what the purpose of this extra set of numberboards may have been.