Swagbucks: Signing Off For The Week

TSG here with another vintage TV sign off, this time from WPHL-17 in Philadelphia. What makes this one unique is that TSG can’t figure out what year this is from – Hal seems to think it’s from somewhere between 1977-1980. Any Philadelphia Swaggernauts have info on this one? If you have a guess or if you know, please leave a comment!