Louis-
Thanks for the additional information!
There were four such cars:
Information from STREAMLINER CARS VOL. 2 THE BUDD COMPANY by W. David Randall
Item 2059 Lot Number 96014 Ordered 9/38 Delivered 3/39
CB&Q #301 SILVER STAR Observation 22 Seat Parlor 24 Seat Diner
(had two letterboards on both sides of the central door on the right side to accommodate “BURLINGTON” and “ZEPHYR” and one centered on the left side for “BURLINGTON ZEPHYR”
Item 2093 Lot Number 96110 Ordered 9/39 Delivered 10/39
CB&Q #300 SILVER SPIRIT Observation 22 Seat Parlor 24 Seat Diner
(had two letterboards on both sides of the central door on the right side to accommodate “BURLINGTON” and “ZEPHYR” and one centered on the left side for “BURLINGTON ZEPHYR”
Item 2100 Lot Number 96117 Ordered 2/40 Delivered 6/40
CB&Q #300 SILVER HOURS Observation 22 Seat Parlor 24 Seat Diner
(had one letterboard forward of the central door on the right side to accommodate “BURLINGTON ” and one centered on the left side for “BURLINGTON”.
Item 2103 Lot Number 96120 Ordered 2/40 Delivered 6/40
CB&Q #300 SILVER FOUNTAIN Observation 22 Seat Parlor 24 Seat Diner
(had one letterboard forward of the central door on the right side to accommodate “BURLINGTON ” and one centered on the left side for “BURLINGTON”.
Charlie Vlk