The SW1200 was a 1,200 horsepower locomotive from EMD, purchased by CR predecessors RDG, DL&W (EL), New Haven (later PC) and PRR (later PC). These units occupied the 9315 to 9382 number block on Conrail. CR 9315 to 9319 (ex Reading) are of note as they were rebuilt by EMD from Baldwin switchers and are rated as only 1,000 horsepower. All the others are pure 1,200 hp SW1200's. Some of these saw service much later into Conrail, not being retired until 1995, and almost all work for other railroads and industrials today.