Despite the costs involved, Pullman completed the first four production dome cars for GM's "Train of Tomorrow" in 1947. The four cars, dubbed Astra Liners, included a coach, diner, sleeper and lounge-observation., were similar to "Silver Dome" and were displayed to the press on numerous private charters and to the public at the Chicago Railroad Fairs in 1948 and 1949 before they were sold to Union Pacific Railroad for use between Portland, Oregon and Seattle, Washington. Other passenger car manufacturers soon built their own dome car models to compete with Pullman; Budd's first domes, completed in Fall 1947, were the first to feature curved glass and full streamlining effects on the domes and entered service on the Burlington's "Twin Zephyrs" between Chicago and Minneapolis-St. Paul. The Pere Marquette Railroad was the first to operate dome cars east of Chicago in 1948, and in 1949 Baltimore and Ohio Railroad became the first railroad to operate dome cars on the east coast when it introduced Pullman-built "Strata-Dome" coaches as part of the new consists for the Baltimore-Chicago "Columbian". B&O also went so far as to add floodlights on the roofs of its dome cars to illuminate the scenery during nighttime travel.