Chesapeake & Ohio class T-1 2-10-4 No. 3030 poses at Russell, Kentucky, in April 1948. The image was saved from a Flickr site that disappeared in 2008, and also appears in the ABPR Archive, uploaded by Bud Laws in 2003. To crown the success of the C&O 2-10-4 design, the Pennsylvania Railroad, when faced with World War II locomotive design restrictions, based its 125 2-10-4s of 1942-44 on the same blueprint with only minor or cosmetic alterations. The Pennsylvania J-1s, so unlike that idiosyncratic railroad's own experiments in late steam design, are often said to have been its best modern steam power.