In a stunt meant to demonstrate the free-rolling characteristics of freight cars equipped with Timken roller bearings, three women — Jackie White, Jean Crow, and Chris Roberts — heave on a new 55-ton hopper car at Western Maryland’s Port Covington yard in Baltimore in the 1950s. Classic Trains coll.
Roller-bearing stunt on the Western Maryland

One wonders if, on the day this photo was taken, those three brunettes (Jackie White, Jean Crow, Chris Roberts) had the slightest idea that they were about to enter railroad history?
Dr. Güntürk Üstün