The original "North Star" was a Stephenson broad-gauge 2-2-2 locomotive. It was built in 1837, rebuilt in 1854 and withdrawn from service in 1870. It hauled the first passenger train out of the original Paddington Station on 4 June 1836. A replica was built in 1925, using parts from the original, but I don't know its location, perhaps at STEAM. It would be nice to see a picture of it here!