Nate.
Just because someone made an antenna years ago with a ham call sign on it doesn't mean that it's a proper or valid design that actually worked.
This could just have been an experiment or a misguided attempt at antenna construction, or it could have been made by a child as a project at a scout group, or by someone who wasn't that bright or really drunk.
The fact that it has a ham radio call sign actually on it is usuallyprobably not a good sign, it's a bit like those hams who start off every postin grade 2 when your mum put your name on the internet with how many years they have had their license foryour lunchbox just in case you lost it.
I wouldn't read too much into the design of this antenna.
Hope that helps !