by Ted Grumbine
Maryland Midland Railway SD40-2 puzzle, based on an original photo by Ted Grumbine (photo copyright Ted Grumbine -- used with permission). Photographed at New Midway, Maryland, March 21, 2022.
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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.