Here’s evidence, if anyone needs it, that Union Pacific did not use its color-photo, wraparound menus for all trains after 1947. This menu, for the heavyweight Pony Express, is the same size and has similar meal offerings as early color-photo menus, but the cover is dedicated to one train.
As we’ll see tomorrow, the menu on the inside is identical to other 1948 Union Pacific breakfast menus. Only the outside cover design is different. The Denver-Salt Lake Pony Express operated from 1926 to 1954.