Maybe Jim Taylor can weigh in here to confirm, but I believe that white slabside is CSX2171, not CSX2191. I've seen it described elsewhere, with photos including the Utah license plate, and identified as CSX2171. Further, I happen to know that CSX2191, circa 1971, was either Guardsman Blue or Maroon. It was owned by my father at the time. It was blue circa '67 or '68 when he acquired it, and was maroon circa '73 or so when it was sold (I don't know exactly what year he sold it... I'll have to ask him next time we talk... I was just a toddler at the time so I don't exactly recall...
). We've lost track of it over the years, but it certainly wasn't white and in a barn in 1971!