The 2344 New York Central F3 B unit of the early and mid-1950s was produced to be used with either the 2344 or 2354 NYC F3 AA diesel. When a 2344C is coupled between a pair of AA diesels, the end result of an impressive-looking ABA unit. The ABA lash-up was both prototypical and a common sight on US railroads during the 1950s and 1960s.