The Shell Collector 1000 Ravensburger Puzzle

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This puzzle is known from teams classification round in the World Jigsaw Puzzle Championship 2023. This was a first puzzle we ever did with my team (not in the competition) as a practice when we met for the first time. It was also our best time puzzle for a long time with 50 minutes (nowadays, our best time is 38 minutes).
 
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