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27 mm diameter, 6.47 grams (100 grains), plain edge with center hole
Date Mintage Composition
1927 5,000,000* (most common date) Cupronickel alloy (75% copper and 25% nickel)
1933 500,000*
1934 500,000* (key date of series)
1935 1,150,000*
1937 750,000* (key date of series)
1939 1,000,000*
1940 1,500,000*
1941 400,000* (key date of series)
1942 600,000
1942 2,000,000 (1942 & 1943)
(key date) Bronze alloy (97% copper, 2.5% zinc, and 0.5% tin)
1943
1946 1,000,000* Cupronickel alloy (75% copper and 25% nickel)
1947 1,000,000**
* Proof issues reportedly struck. Mintage unknown
** Entire mintage melted down. Some specimens are known
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