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According to Wikipedia, the slinky was first introduced in the US by Richard James between 1943 - 1945, when it first became a "hit". See: http://en.wikipedia.org/wiki/Slinky#Creation
1920
1987
25 were sold in its first year
Over 200 caseses of barbed wire were sold in the first year
1976 was the first year is was sold in the U.S.
The first slaves were sold in 1665.
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there was ove three thousand hershery kisses sold in the first year.
1928.
There were 300,000 copies of 'Uncle Tom's Cabin' sold in the first year of its publication.