The Z5 (B&O 3315-3316) was an art-deco streamlined observation car built in 1949 for the Columbian; running from Washington, DC to Chicago. The two destinations acted as the namesakes for the cars; 3315 as Chicago & 3316 as Washington, which was recently restored & revealed at the B&O railway museum (Check it out!). This model is R40 capable, and the rocker panel sections aft of the bogies swing out. Bearing axles are recommended due to its weight. submitted by /u/Own-Department-302 ...