Also, BUDD had initially termed the cars as SIESTA COACHES. (The Denver Zephyr's SILVER SIESTA may have been a hint to this.) Interestingly, NYC never actually owned the cars, but were on lease from BUDD. They proved to be quite popular, and when NYC's converted 22 roomette cars entered service, the original 4 cars all operated on the 20th Century Limited for a short while. The cars were returned to BUDD in 1964 (who eventually sold then to the Northern Pacific).