Pitkin County Sheriff (Aspen) used them also. Late 70's-Early 80's. It was a promotional deal that a couple of Saab executives put together after a skiing junket (and lots of gormet five-star dining plus some high-test vino) in hopes of selling some Saabs. There was an advertising campaign, of course. But the whole "Saab-as-your-favorite-neighborhood-police-car" thing crashed into some Double Diamond moguls! LOL.
It was about the same time another famous Colorado law enforcement agency (Lakewood PD) was dabbling in enhanced public relations by calling its patrol officers "Public Safety Agents" and dressing them in blazers with no weapons or handcuffs, etc. showing. That experiment also went out in a blaze-of-no-glory, and the police-chief-disguised-as-a-public-relations-huckster had his fru-fru lunch handed to him in a designer Adam-12 lunchpail. (The more intoxicated miscreants often mistook officers on patrol as movie ushers or country club waiters ... it made for lots of extra issues no one needed.)
Ahhh ... such were the post-hippy days of softer law enforcement in the Rockies!