Here are 2 photos of Pittsburgh Railways #3487, a Double Truck, Double End High Floor Car built by St. Louis Car Company in 1905. This car has been preserved and is on display at the Pennsylvania Trolley Museum. The first photo from the PTM website shows it in service on the #13 Emsworth Route around 1909. The second photo shows it at the Museum as pictured on a postcard during the early years of the Museum.
And now that we’re focusing on uniforms, note that the conductor and motorman’s jackets appear to button down the middle but with the left side on the outside.
Bill