The Learjet 60 was fitted with highly flat-rated 4,600 ... plus the Enhanced Ground Proximity Warning System, a plusher interior and upgraded inflight entertainment system. Triple-disc brakes ...

sold his 60-percent share of Learjet in 1967 for $27 million to the Gates Rubber Co. Gates would go on to develop the rest of the larger Lear 20 series: the popular Lear 35 and the Lear 55.