Sylvia Anderson first episode of a series then sharing the work according to their strengths. Gerry tended to specialise in special effects and hardware, and Sylvia in character, voices, costume, dialogue, and plotlines. In this way, Anderson contributed plot development and voice work for a series of half-hour shows including "Supercar", "Stingray" and "Fireball XL5". However, she felt the half-hour format was insufficient to fully develop characters and stories, and she persuaded the team's TV producer Lew Grade to extend their shows to a full hour. In the early 1960s, the Andersons co-created the series "Thunderbirds", and Sylvia created the characters. She
Mercury M series greater coverage for potential truck buyers. To differentiate Ford and Mercury trucks, Mercury added a brand-specific grille and slightly different exterior and interior trim. In 1948, following the introduction of the Ford F series, Mercury adopted the use of the "M" prefix, for Mercury. From 1948 to 1950, nominal tonnage ratings were replaced by a series designation in which the numbers indicate the GVWR when equipped with tires of appropriate capacity. Each code number is arrived at by dividing the GVWR of the series by 100. Thus an F-47 (M-47) indicates a GVWR of 4700 lbs., F-135 (M-135) indicates 13500