Broeker turned up at the 1963 US Grand Prix with his own F1 Stebro, powered by a pushrod Ford motor. Qualifying some 15 seconds off the pole-position time, he finished seventh, 22 laps down on the winner.
Loris Kessel was a Swiss racing driver who died in Montagnola in 2010 following a long illness. He participated in six Formula One World Championship Grands Prix, debuting on 2 May 1976. He scored no championship points. In 1976, he drove a Brabham for RAM and in 1977 he drove his own Apollon-Williams although this car was not a success.