Posted 04/21/2014 12:24 pm
These appear to be Machine Doubling. The devices aren't thicker, they are reduced in side and flat. From what I can see, all of these exhibit the Machine Doubling (MD).
The 1970's were reknown for having lots of machine doubled coins. One thing to note is that the mint mark usually will show Machine Doubling, and it usually is an the same angle as the date or other devices. Typically on a Doubled Die Obverse, the Mint mark is not doubled.... why?
Because on doubled dies its the die itself that has the issue. Doubled dies have the doubling engraved into them, so thats why you will see doubling on the devices (numbers, letters and other objects). The Mint mark before 1990 was put on by hand and was a separate process. The only reason you'd have a doubled die with a doubled mint mark is if the Mint mark was a repunched mint mark.
Don't confuse doubled dies and double strikes togther. Doubled dies have the doubling engraved into them, so thats why you will see doubling on the devices (numbers, letters and other objects). A Double Strike means the die struck the coin twice, and should leave a double impression of everything if it is "done correctly"
Double strikes don't matter on proof coins - unless they are WAY OFF. Most proof coins usually have 2 strikes with specially made dies, and polished planchets to give it that sharp mirrored look. I have seen proofs under the microscope that were struck 4 times.
The 1970's were reknown for having lots of machine doubled coins. One thing to note is that the mint mark usually will show Machine Doubling, and it usually is an the same angle as the date or other devices. Typically on a Doubled Die Obverse, the Mint mark is not doubled.... why?
Because on doubled dies its the die itself that has the issue. Doubled dies have the doubling engraved into them, so thats why you will see doubling on the devices (numbers, letters and other objects). The Mint mark before 1990 was put on by hand and was a separate process. The only reason you'd have a doubled die with a doubled mint mark is if the Mint mark was a repunched mint mark.
Don't confuse doubled dies and double strikes togther. Doubled dies have the doubling engraved into them, so thats why you will see doubling on the devices (numbers, letters and other objects). A Double Strike means the die struck the coin twice, and should leave a double impression of everything if it is "done correctly"
Double strikes don't matter on proof coins - unless they are WAY OFF. Most proof coins usually have 2 strikes with specially made dies, and polished planchets to give it that sharp mirrored look. I have seen proofs under the microscope that were struck 4 times.
Edited by Collector-Corner
04/21/2014 12:30 pm
04/21/2014 12:30 pm
