The reason for the question mark in the title is a meet like this could indeed have happened, but there is no evidence of it.
The date is 1971, and Southern Railway 2-8-0 #722 is passing through Johnson City, TN leading an Excursion to Bristol, VA. The 722 prepares to make a stop at the Southern's Johnson City depot, and on the way passes familiar territory.
You see, the 722(along with sister locomotive #630) spent 15 years from 1952-1967, operating on the ET&WNC railroad as their 208 and 207 respectively. In December 1967, the ET&WNC traded the 207 and 208 back to the Southern for use in their rapidly expanding Steam Excursion Program, in exchange for two RS-3 diesel locomotives.
In this scene, the 722 excursion passes ET&WNC 209, one of the very diesels that replaced her, headed down to the ET's interchange with the Southern to pick up a cut of cars.