hello and good day

I have had very shy luck finding interior pics of vintage UP round-end observation cars. if anyone has info or pics of these beautiful coaches, pls share them here

For both of your inquiries, take a look at Youtube. I've seen several promotional videos from that time. Since these were among the most promotable cars you might get lucky. Also look for magazine advertisements from the 1940s and early 1950s, Life magazine, etc. At one time Sunset magazine was published by SP. I don't know when they sold it, but while under their ownership I would expect an emphasis on SP.