found one of those myself.....down here in Missouri. There was a few of them on e-bay for sale (less than ten dollars) and they were also 1922, maybe the pittsburg railway co. was only in business for a year....who knows. HH......gregd573
I've found a dozen or so of these, and they all say 1922. Pittsburgh Railways was the electric trolley service in and around Pittsburgh; the last trolley was retired in the last fifteen years, I believe.