by Dave Carney
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Delaware Lackawanna PA4 puzzle, based on an original photo by Dave Carney (photo copyright Dave Carney -- used with permission). Photographed at Tobyhanna, Pennsylvania, July 11, 2025.
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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.