Looking For Doubling Is Frustrating As Possible When You Are Learning

Everything here looks like hits/damage, to the coin, not hub doubling. Stay the path and pay attention, read up on what doubling and errors actually are. It's good to read the different threads here too, see what all the different things are. Die events, hub doubling, errors, damage and so on. Just be patient and pay attention.

@ker, can you please add the date and mint of this cent to the thread? That helps with the search functionality. Thx!

You are looking at the areas where Machine Doubling and die wear are most often found. A DDO will be seen on the devices as a wider area on the centers of the devices. This doubling is on the die, not caused by die wear or the striking process. ( Machine Doubling) If the devices are normal sized, it is not a DDO. Seeing the differences through the years compared with a normal die, would be more helpful for you:
Note through the years the side by side comparisons, that show extra width of the devices. (Even though they may look like Machine Doubling, they are wider. Compared with normal die and DDO's:

Note the spread on these DDO's? Wider/taller on the devices compared with normal coins:





Note the devices are wider vertically?



Note on each set of images, the differences between a normal die and a Doubled Die:

You are training your eyes to spot the differences.


Note the size differences?

Note the spread differences on the devices:





Some years (1972) the dates will be affected so you can spot them a lot fast. Note the '9' shape differences between a DDO and a Normal coin:

Some devices are altered differently on Doubled Dies:

The different die numbers can be different? Why? Because the hub doubling is different. (More than one listing for doubled dies)

Different areas are affected by different hub doubling:
Ears:

EPU on Memorial Cents:


On the single squeeze dies on cents, the hub doubling is different. Sometimes it is a distortion of the devices shapes:





Note the distortion of the Doubled dies on the Single Squeeze dies:

Even the slightest differences are fingerprints to a certain die

Different die numbers.

These are images of the same die number compared with a normal example.
Can your eyes spot this a lot better now?
Now look at the differences between a Normal/Machine Doubled/DDO looks like side by side?

See the differences now? Machine Doubling is a removal of the contour on a coin, thus making the devices smaller in size. While hub doubling (Doubled Die) enlarges or even creates a second set of devices on a coin?

Is this helping to train your eyes? If so you are finally starting to see the differences on a doubled die/normal die and an altered post strike coin.

CoopHome: What is the differences between a Doubled die, A normal Coin and Machine Doubling? Spread on Doubled dies, normal sized devices on normal coins and reduced contour on Machine Doubling. Don't forget to use your glasses on these images to see even more.