by Mike Molnar
CSX Transportation (CSXT) AC45CCTE puzzle, based on an original photo by Mike Molnar (photo copyright Mike Molnar -- used with permission). Photographed at Blue Island, Illinois, July 5, 2017.
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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.