by Tom Nelligan
Massachusetts Bay Transportation Authority (MBTA) F40PH-2C puzzle, based on an original photo by Tom Nelligan (photo copyright Tom Nelligan -- used with permission). Photographed at Littleton, Massachusetts, October 17, 1987.
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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.