I'm thinking it's low band. Believe it or not, before I read where and what vehicle it was on, I was going to say it's was a CB antenna. It's the coil at the bottom that's got me thinking that way. The antenna reminds me a lot of the VHF low band antennas, made by RCA at the time, that Novi, Michigan, used to have on their cars 30 years ago, before they went VHF High. Novi's old antennas didn't have the piggytail in the middle of the whip, but the bottom coil and the hinge look very much like it.