This is a close up pix of the front right corner of NZ's (Nebraska Zephyr) lounge/power car Venus.
This small font BURLINGTON indicates that this is a CB&Q car.
Because the NZ is an articulated consist with the cars permanently coupled together, it is odd to have to state BURLINGTON on the car ends.
Other Zephyr trains that were jointly operated with other RRs had small RR initials at the upper end corners to indicate ownership.
On the California Zephyr, the RR owner marks were CB&Q, D&RGW, and WP (and PRR on the Pennsyβs one CZ sleeper Silver Rapids).
On the Great Northern's Empire Builder & Western Star trains, the RR owner marks were GN and CB&Q.
On the Northern Pacific's North Coast Limited & Main Streeter trains, the RR reporting marks were NP and CB&Q.