Jack Brabham
Brabham won three world championships: 1959 and '60 in a Cooper Climax and then in '66 in his own design. He came in second in '67 behind his driver Denis Hulme. We've got the Cooper Climax in a stamp too.
Stamp: light cancelled, approx. 1.5 x 2.5 inches, 5 x 7 frame.
$21.95
Jim Clark
Jim Clark won the world championship in 1963 and 1965 so I am not sure why the stamp has 1962 on it. In '62 he placed 2nd behind Graham Hill in a BRM. Clark was killed in April 7, 1968. I remember it well. I was at an SCCA race.
Stamp: Mint, approx. 1.5 x 2 inches, 5 x 7 frame
$21.95
Juan Manuel Fangio etc.
Juan Fangio, upper left, was five time world champion. Pictured is the last of the straight-eight Grand Prix cars, a Mercedes-Benz W196. Below him is Carlos Reutemann who drove a Brabham in F2 and went on to F1. The other fellows I am not sure who they are except that the guys in the lower right are brothers.
Stamp: Mint Souvenir sheet, approx. 4 x 5 inches, 8 x 10 frame
$24.95
Clay Regazzoni
Regazzoni drove for Ferrari and won the Italian GP at Monza in 1970 and helped him get 3rd in world championship points that year. I know where this drawing of Regazzoni came from. The photo it was copied from appears on page 212 of Jose Rosinski's book Formula 1 Racing: the modern era.
Stamp: light cancell, approx. 1.5 x 2.5 inches, 5 x 7 frame.
$21.95

Jackie Stewart
Stewart might be best know to Americans as a tv commentator but the Scott won the 1969, '71 and '73 world driving championships. He finished second in '72. He also placed second in '68 and was as high as 3rd as early at '65. He drove a BRM, Matra-Ford and Tyrrell-Fords. Don't believe that is a Tyrrell depicted since all the Tyrrells I've ever seen were blue. Artistic license I guess. The shots I've got in color of the Matra shows it in French royal blue. The photo I have of Stewart in '69 shows him with the number 7 and those "wings on sticks".
Stamp: Light cancell upper right, approx. 1.5 x 2.5 inches, 5 x 7 frame.
$21.95