on these cars than on equipment that came before them Also introduced was the rollsign to the New York City Subway, an innovation that would be repeated on many other rolling stock orders. Older cars had metal signs which had to be physically removed and replaced to change. Rollsigns simplified the process by allowing train crews to update the sign's display by merely turning a hand crank (which would later be replaced with an allen wrench to prevent tampering in later rolling stock). Early A/B Standards (cars 2000–2499) had the smaller size rollsigns installed in the windows behind side door pockets, while later cars equipped with larger signs placed them in the upper half of side windows for better visibility. These were shifted to a different window in the 50 trailers of 1924. During the late 20s and early 30s, the BMT installed special features on some of these cars. 2222-3-4 had a bridge/tunnel indication light at each end of that unit. 2553 had arm bars on the side seats alongside the doors opposite from where the drop seats were located. Also, the following units were furnished with gum dispensing machines: 2300-1-2 through 2357-8-9, 2375-6-7, 2400-4000-2401 through 2424-4012-2425. 2018 had elongated arms on its hand stanchions. Shortly after unification, car 2014 was out of service long term due to some major mechanical problem. When it reappeared in service after a few years, there had been some changes - it received the larger door pocket compartments typical of the later Pressed Steel cars rather than the smaller variety that the ACF cars had. Additionally, it was equipped with longer emergency light fixtures that extended further out. In the mid-40s, the Board of Transportation experimented with different interior paint schemes as an alternative to the more usual olive drab. All divisions had cars that were tested for different combinations. With the A/B Standards, the following cars were tested: 2333-4-5 dark, green, and gray. 2381-2-3 brown and tan. 2666 dark, red, and gray, with a red stripe running just above the windows. 2698 dark, green, and gray. 2747 dark, blue, and gray. It was finally decided to paint the BMT cars with a light apple green and olive drab combination, and this was applied as well to the IRT Steinways, both regular and World's Fair, that were now being maintained in the Coney Island Shops. Propulsion and braking Low Voltage propulsion control was