Buffalo Southern Railroad RS-18 puzzle, based on an original photo by J.A. Muscarella (photo copyright J.A. Muscarella -- used with permission). Photographed at Eden, New York, June 26, 2017.
The "Easy" version of the puzzle has about 100 pieces, "Medium" has about 200 pieces, "Hard" is about 300 pieces. For the Online puzzles, see the Online Puzzle Tips.