After World War II the 10-roomette 6-double bedroom (colloquially the "10-6 sleeper") design proved popular in the United States, with 682 such cars manufactured.

[2]: 153  All fifty Pacific series cars were built on Budd lot number 9660.039, and allocated Pullman Plan 9522.

[4]: 50 Budd delivered the fifty cars between December 1949 and June 1950;[3]: 162  the "largest class of sleepers on the Union Pacific rails."

[4]: 50  One car, Pacific Empire, was written off after a rear-end collision at Wyuta, Wyoming in November 1951.

[citation needed] The Milwaukee Road purchased five from the Union Pacific in June 1969 in order to equalise the per diem payments on their jointly-operated Overland Route passenger services.