History of Trains Puzzle “Fun” and “learning” unite for a great interesting time spent putting this puzzle together. 26 detailed scale locomotives are featured from the development of the earliest steam to the giants of the mid-20th century. Each Locomotive is named, identified by its country of origin and includes historical data with a timeline of railroad history. Made in the U.S.A. 1000 pieces. 19 ¼” x 26 5/8”.