It's a grape coloured slot loader. I'm tempted to take it cos I'd definitely be opening it up anyway to turn it into an external monitor, but probably not worth the risk for asking price.
I'm only familiar with these slot loading models and i know that there is a cable mounted with 2 screws to the motherboard that goes to the neckboard of the CRT. Maybe worth a try to reseat it. Otherwise, yes, a weird pattern...