I think the CV-580 from Sierra Pacific under CAL colors was before Continental bought Rocky Mountain. Rocky Mountain started in Denver as you said. Became Continental Express with the addition of BE-1900 and ATR-42's.
@@Tom-mu7zy actually Aspen Airways bought Rocky Mountain Airways through an agreement by handshake ( legal and binding in the state of Colorado) and later RMA sold out to Continental for a higher price. RMA/Continental was sued in court on antitrust charges.
