It depends on what you mean by "double dated". I can think of 3 possibilities:
# Many years ago it was common for the Mint to reuse coin dies from a previous year by simply repunching the date field. Sometimes a bit of the old date would show through; this is called an "overdate" or "overpunch" # On rare occasions the die used to strike a coin receives two impressions, slightly misaligned. This is called die doubling and most famously occurred on 1955 cents. See the related link below for a picture. # Or, you could be referring to a "two headed" or "two tailed" coin. These are novelty items made by cutting apart 2 real coins and joining the two fronts or backs. They look just like ordinary coins with two faces (or tails). They have no numismatic value.
A US one cent coin dated 1906 is a Indian Head (1859-1909) cent.
There's a picture at the Related Link.
The easy way to see one is, type in 1955 Double Die on your browser and click images.
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It simply looks like an x.
A US cent dated 1913 is a Lincoln cent and the word Liberty is also on the front of the coin.
A US one cent coin dated 1906 is a Indian Head (1859-1909) cent.
There's a picture at the Related Link.
All 2004 U.S. penny's are lincoln cents. Look at the coin again and post new question.
The easy way to see one is, type in 1955 Double Die on your browser and click images.
A US Large cent dated 1847 is a "Braided Hair" Liberty Head cent. Type this into your browser and click images.
A US Large Cent dated 1797 would be a Draped Bust cent. Type this info into your search box and click images.
Look at the coins again. No Flying Eagle cents are dated 1886 or 1909. They were only struck from 1856 to 1858.
Cents dated from 1982-present are made out of copper plated zinc. If you strip off the plating either by chemical means or simply scraping it off, the penny will look like silver. Of course, you can also plate the penny with silver. These do not raise the coin's value and its only worth a penny.
It looks exactly the same as the 2010 or 2012 penny.
The US coin looks very much like a modern US penny
No one knows because they don't exist. The term Double Eagle is only used for $20 gold coins and none are dated 1990.