fill through 1976. For 1940, the price (for the third year in a row) and general styling remained the same, with only modest trim changes. Of special note is that 1940 was the last year that side-mounted spare tires (optional on all Cadillacs, including Sixty Special) were offered. The Sixty Special line expanded to four models this year: Touring Sedan (the base model), Imperial sedan (priced at $2,230, it featured a retractable glass partition between the front and rear seats), and two open-front Town Car models (one style with a painted roof, the other with a leather-covered roof). These two very formal cars had a removable roof section over the front seat and a glass division window. Of the Sixty Specials built in 1940, 4,242 of them were the Touring model. There were 113 Imperials (including 3 that were also equipped with the sun roof), and lastly, only 15 Town Car models. Of the 15, 9 had the painted metal roof (priced at $3,465), and 6 were the formal leather-covered roof version (priced at $3,820). 1941 was the last year of Harley Earl and Bill Mitchell's original Sixty Special design, as an all-new 1942 model was in the works. Many consider the 1941 to the most beautiful of this series, though Mitchell himself favored the clean lines of the original 1938 model. For the first time, Cadillac had its own front end design—the wider than high "tombstone" grille with a forward-jutting center section flanked by flat side sections — that would identify Cadillacs for years to come; the new grille appeared as a horizontally-oriented rectangle when viewed head-on hence the nickname. Other changes were longer front fenders that terminated with extension caps attached to the front doors, fully engulfed the lowered, widely positioned headlights and (in concert with a new hood) filled the formerly vacant area adjacent to the engine compartment; the rear fenders now held full skirts as standard. For 1941, the wheelbase was reduced by , down to . Sixty Specials showed a $105 price increase (for the first time) to $2,195. Power was still supplied by the same Cadillac engine as before, but was now rated at . Production totals include 3,878 Touring sedans (including 185 with the sun roof option), and 220 Imperial sedans (now priced at $2,345). Only 1 Sixty Special Town Car was made this year and used on the auto show circuit before