At least one independent manufacturer was ready to make that happen; George W. Mason, President of Nash-Kelvinator. Mason wanted a postwar combination of independents, a fourth player in an automotive Big Four, with Packard as the luxury division. All independent automakers faced problems. By 1954, there was only a "Big Two," as Chrysler's market share fell to 12.9%. All Cadillacs had been downsized for 1936, were effectively junior cars ever since, increasingly sharing components with lesser divisions. For example, a 1941 Cadillac convertible shares every piece of sheet metal with the 1941 Pontiac ragtop. Rolls-Royce was principally an aero engine manufacturer since 1935, the cars an increasingly boutique sideline, an "assembled" product cribbing from Buick, Packard, Chrysler, postwar R-Rs and Bentleys having bodies stamped by Pressed Steel near Oxford, who also served much of the rest of British automakers. Despite the company's postwar cash reserves, Packard continued production of its now dated L-head straight eight engines through 1954, competing against a field of OHV V8s. Moreover, the small independent automakers could not achieve unit costs and tool amortization down to GM/Ford levels, nor afford the requisite TV advertising and annual model changes. For 1946–1947 all Packards used Clipper bodies and the "Clipper" name. The Clipper nameplate was dropped for 1948 as Packard issued its Twenty-Second Series automobiles, which, while proclaimed by the company as "all-new," were actually restyled Clippers. Only the 1941–47 Clipper's roof and trunk lid survived. At this time, Packard's president, George Christopher, insisted upon concentrating on sales of the company's lower-priced cars, while longtime competitor Cadillac focused its attentions on the upper end of the market. The Twenty-Second and Twenty-Third Series (from mid-1949) cars wore the "upside-down bathtub" styling that was briefly in vogue in the late 1940s. Unfortunately for Packard, Nash, Lincoln-Mercury, and Hudson, the four manufacturers who embraced this type of styling, General Motors introduced designs that were lower-slung, more tightly drawn and less bulbous at around the same time. GM's designs caught the buying public's fancy, while the "bathtubs" quickly fell from favor. Following a round of bitter corporate infighting in 1949, Packard management finally decided to phase out the "bathtubs" and create the all-new Twenty-Fourth Series for 1951.