With modern minting methods, the possibility of a coin with the same image on both sides should be just about nonexistent and, should never make it into circulation in the unlikely event that one is struck.
Any coin with a "genuine" minting flaw would have some value, above the usual, as a collectible coin.
Genuinely flawed coins are not necessarily known about or documented until somebody turns up with one, since they are an "accident" of the minting process, and have escaped detection during quality control at the mint therefore, a valuation cannot be anticipated.
A reputable coin dealer should be able to identify and confirm the coin as genuine and make a valuation.
Also, many coins are commercially produced for magic or trick purposes and these include "double headers/tails" and "impossible" coins like a US silver Dollar on one side and a British copper Penny on the other.
Close inspection of the coin may reveal that the inscription is not quite right, that King George has Mickey Mouse ears or that Britannia is wearing football boots or some other alteration to avoid charges of counterfeiting.
Some are, some are not.
It depends greatly on the country of issue, the year and the condition of the coin.
Depending on the DVD you may have: 4.7 GB (single-sided, single-layer - common) (Two hours of high quality video) 8.5-8.7 GB (single-sided, double-layer) (3.5 hours of high quality video) 9.4 GB (double-sided, single-layer) (4 hours of high quality video) 17.08 GB (double-sided, double-layer - rare) (8 hours of high quality video) Double sided disks can be written on both sides, which is why they hold about twice as much.
An ultra rare
no but a 1934 lincoln penny costs a million so thats rare
ultra rare!
They are not rare at all.
I know there are double-sided wrap skirts.
how much is 1938 penny worth
A roll of tape or double-sided tape.
No it's not. They are very common.
Are you referring to a copy machine. Duplex copies are printed on both sides of the paper. If copying from originals, normally the following options are available. 1 -> 1, single sided copies from single sided originals. 1 -> 2, double sided copies from single sided originals. so 4 sheets -> 2 double sided sheets. 2 -> 2, double sided originals make double sided copies. 2 -> 1, double sided originals make single sided copies. So 2 double sided originals make 4 sheets single sided copies.
1793
Neither of these are considered rare.