Good find, CougarTim! Buick Ambulances became especially rare when Flxible, who had been active in the professional car business with their Buick coaches for decades, only built one prototype in 1965, then stopped offering funeral coaches and ambulances and decided to focus solely on the bus business. Joe Summers of Summers Funeral Car Co. in Duncanville, a distributor for Flxible Buicks, bought the professional car toolings from Flxible and opened Trinity Coach Co. to fill this new gap. Unfortunately, this wasn't an utterly successful venture and Trinity only lasted from 1965 to 1968. And this looks like another Triune ambulance.