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1597. 7" long, take a look at Neatorama for more guesses on this piece:
1598. 9-1/2" long:
1599. The box measures around 7" x 8":
1600. 28-1/2" long:
1601. 18" tall:
1602. Approximately 7" long:
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Last week's set is seen below, click here to view the entire post.
More discussion and comments on these photos can be found at the newsgroup rec.puzzles.