B&O in transition, September 1955. EM1 7600 is moving from the coal dock to the water plug in preparation for the days work while Q4 Mikado 4476 is just off the turntable, and making her way under the tipple.Looming behind the steamers, the torpedo tubed GP9 locomotives have already shoved the light Pacifics off the local passenger runs, and the Baldwin Sharks along with EMD, and Alco road power are doing their best to take the heavy freight trains from the 7600 and her sisters. The EM1s and the Q4s will be around for a few more years, but soon they will be relegated to branchline jobs until they are unfit for service, and condemned to the scrappers torch.