was then refurbished by the UP, renumbered LA-4 and placed on City of Los Angeles service in July 1938, paired with a train powered by the 3-unit E2 set of LA-1, LA-2, and LA-3 to double the service frequency on that route. After less than a year as the City of Los Angeles, the LA-4 was replaced again, this time by a train equipped with the new EMC E3s LA-5 and LA-6 in March 1939. In June of that year, the lead power car of the train was rebuilt as a booster unit, renumbered to CD-06-C, and added to the former M-10006, now renumbered as CD-06. The trailing power car was added to the former M-10005, now CD-05, as CD-05-C. Both cars were scrapped with their respective power sets in 1953. The car set from M-10004 became backup equipment in the City fleet, pressed into service after the wreck of the City of San Francisco in August 1939. The set was assigned to the City of Portland run, powered by the former LA-5 and LA-6 E3 locomotive set, between July 1941 and February 1947. The cars were assigned to service as a City of Denver set while the primary sets were renovated in late 1947, then stored in 1948 and scrapped in 1951. M-10005, later CD-05 Completed in June 1936, M-10005 entered service as the first of two new streamliners, the "Denver twins", for the City of Denver service on June 18. After approximately a year of running that service, during which the train and its sister M-10006 had moved 129,000 passengers and travelled 765,000 miles (1,231,000 km) between the two, the train was renumbered CD-05. In 1939, the former trailing power car of LA-4 (ex M-10004) was added as a third locomotive unit to the power set, giving it a total of 3,600 hp (2,700 kW), and the consist was lengthened by two cars, to nine. In this form, CD-05 continued in service until March 1953, when it was replaced by new E8 units and scrapped a few months later. M-10006, later CD-06 M-10006 followed a similar service life to its sister M-10005, being the second of the "Denver twins". It was renumbered to CD-06 in June 1937, and added the rebuilt first power car of LA-4 (ex M-10004) as its third power car in 1939. It was withdrawn alongside the other units during March 1953 and scrapped. References