by jfrey40535
They've always been there. The LED's are new additions. Some cars still have the older manual style number display on them where the operator simply scrolls the numbers by hand until his block is displayed, similar to the Neoplan buses. The interesting thing to check would be old photos of the Brill cars to see if they had them as well. I'm guessing since its part of the transit division that SEPTA just standardized the whole fleet by having every vehicle assigned a block number.