leaving ownership split between his wife, and the surviving wife of Harry Kent and another company director. Uninterested in owning the company, all three initially planned to offer their ownership to company employees, but financing for the offer was never completed. In 1945, ownership of the company changed as Pacific Car and Foundry Company negotiated its purchase of Kenworth as a wholly owned subsidiary. By the end of 1946, Kenworth relocated again, following the purchase of a former Fisher Body factory by Pacific Car and Foundry; this would house all Kenworth manufacturing under a single roof. In 1948, Kenworth redesigned the cab of its COE product line, later nicknamed the "Bull-nose" 500-series. 1950s: Market expansion By 1950, Kenworth had grown outside the Pacific Northwest, marketing vehicles across the western half of the United States and across nearly 30 countries worldwide. In 1951, the company received an order for 1,700 Model 853s from ARAMCO in the Middle East. The Model 801 was introduced as an earth-moving dump truck, adopting one of the first cab-beside-engine configurations. In 1955, Kenworth began the redesign of its COE product line, launching the CSE (Cab-Surrounding-Engine); in line with the Bull-nose, the CSE shared its underpinnings with the 500-series trucks and did not have a tilting cab. In 1956, Pacific Car and Foundry revised its ownership of Kenworth, changing it from an independent subsidiary to a division. The same year, the 900-series was introduced with an all-new "drop-frame" chassis, with the CSE cabover replaced by the K-series COE (derived from the 900 series). In 1957, Kenworth ended bus production, selling the rights to its product line (see below). In 1958, Kenworth became a sister company to Peterbilt, as the latter company was acquired by Pacific Car and Foundry. In 1959, the company further expanded its sales base, establishing facilities in Mexico. 1960s: W900 and K100 For 1961 production, Kenworth underwent a substantial revision of its commercial truck line, debuting the W900 and the K900 (later renamed the K100); the W and K model prefixes are derived from company founders Worthington and Kent. The W900 debuted the first complete redesign of the Kenworth conventional cab since 1939 with a standard tilting hood. Similar in appearance to the previous K500, the K900/K100 received a taller cab and the doors of the W900. To meet increased demand for the new product lines, Kenworth opened a new assembly facility in Kansas