I don't believe GM offered signals as an option until the mid-late AD years, and then it would have looked very similar .... nothing wrong with that one if you've got it or can grab it at a reasonable price
"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir "When we tug a single thing on an old truck, we find it falls off" ~ me Some TF series details & TF heater pics