Though a tiny bit to young to actually remember Signal being open, I loved old gas ads, and signs as a kid. But I don't remember ever seeing Signal with the flag logo before either. So I did some searching, and didn't find as much as I had hoped. But this gas station forum page was interesting reading.
I at least expected a Wikipedia page or reference, but AlliedSignal co was all there was and the is nothing there for Signal on pre-merger(with an old Signal pump shown)
Somewhere else said it wasn't the same Signal gas company that merged.
Do you have enough knowledge to write that Wiki page?
I always forget because "full service" is non existent today, but I earned a few sodas myself sitting in the garage, or in the shade of the old Pegasus sign waiting on a breeze, or for the "ding-ding" of the air chimes to break the thick summer air.
Winter was worse, cooped in a fume filled building wishing for more heat. Hammering ice chunks off wheel wells, and cleaning frozen windows. Salt and water/ice/snow from the sides of cars, and the parking lot would saturate my pants fully, and they would stand up alone to mid thigh if they dried on me before going home for bedtime.
I wouldn't have skipped it to work at the theater.
Years before I could legally be there for a pay check, we could help for an hour then had to leave, so we took turns. I could pull in near twenty in tips on a good day plus pay later. I was dirty often, but loaded for a pre-teen. The owner died right after I was there for a paycheck too, only two or three paid weeks.