Coins are struck, not etched which involves removing metal by use of acid, so it's not clear what the question is asking. Some possibilities:
If your coin has a small picture of JFK or someone else facing Lincoln, it's a novelty piece made outside of the mint and has no value to a collector. If it has the same design but struck twice on the same side, it could be a somewhat rare double strike but it would have to be examined in person by an expert to say for sure. And if it has Lincoln's image clearly shown on both sides it's a fake called a magician's coin.
In circulated condition, one cent. Uncirculated, about 3 cents.
Issue price was $7.00, current retail values are $7.50-$9.00
Issue price was $7.00, current retail values are $9.00
All 1968 cents were struck in bronze. If your coin is silvery in color it's almost certainly plated. In addition if it were made of aluminum it would weigh only about a gram, 1/3 the weight of a cent from that year. The only aluminum US cents ever made were experimental pieces in 1974 and none were ever put into circulation.
It's almost certainly zinc rather than aluminum. The only time aluminum cents were made was 1974, and these were experimental pieces never put into circulation. Since 1982 US cents have been made of copper-plated zinc. If the copper plating was removed (e.g. by dipping it in acid) the silver-colored zinc will show. Compare the coin's weight to a standard cent minted after 1982. If they're the same, your coin is just an unplated zinc penny. An aluminum cent would weigh only about 1/3 as much as its zinc counterpart.
It's a novelty coin that has no collectible value.
It's worth 2 cents for the copper.
Proof pennies are only made at San Francisco. It's not a proof. It is just a penny worth a penny.
Value depends on the size of the clip, average value is $3.00-5.00
It's worth about 2 cents for its copper content.
Not sure. I have a 1974 penny with a baseball batter and pitcher stamped in front of lincolns face. The batter's jersey ends in 'TS' Any idea what this coin is?
It's worth about 2 cents for its copper content.
The state was stamped on it after it left the mint. It has no collector value -- novelty value is perhaps 25 cents.
It's almost certainly either a privately-issued piece or a genuine penny that was altered. Either way it has no collector value.
The 1974 copper Lincoln penny typically sells for its face value of one cent in circulated condition. However, if it is in excellent condition or uncirculated, it may fetch a few dollars. Additionally, if it's a rare variety, such as the 1974-S proof penny, it could be worth more. The value may vary based on demand and the specific condition of the coin.
A 1974 penny with an "S" mint mark, known as a proof coin, typically has a value ranging from $0.50 to $2.00, depending on its condition. If it is in uncirculated or exceptional condition, it could be worth more to collectors. However, if it is a regular circulation coin with wear, its value would be closer to its face value of one cent.
There seems to be some confusion here. Kennedy is on the half dollar, while Lincoln is on the penny. A 1974 Kennedy half is worth 50 cents. A '74 Lincoln cent is worth 2 cents for its copper content.