The #1 item on that page fondly recalls, "The subway, bus and the trolley were only a thin dime to ride," above a picture of a D train to Coney Island, however, to the best of my recollection, the D train didn't run to Coney until some time after the fifteen cent token era began.
Pete
ps - I looked it up. Fifteen cent fare ran from '53 - '66, D train to Coney began in '54, so not as long after the increase as I thought.