When searching through coins, I look at what is know to happen on a series. Then I look for that on every coin I search. I figure if it happen once, it can happen again on a different die. If you don't have access to look directly at doubled dies, look at the different sites to see if you can pick up on what to look for.
Obverse doubled dies: Some have doubling the bust:
Note nose and lip affected. Doubled eyelid:
Motto hub doubling:
Sorry I don't have any date/LIBERTY hub doubled coins at this time.
Reverse doubled dies: Here is a very strong one for 1939:
Not the doubling on the lower half of this die. There has not been found another one that has doubling that strong yet. But keep looking, it might happen again.
Doubling on the EPU: Most of the time you find hub doubling on the reverse on either the EPU area or the USA area on the bottom of the coin. Here are a few examples. It can be strong or minor. But note the areas affected and then look there:
Nice strong doubling on the bottoms, center and tops of the devices.
Note the hub doubling on the tops of these devices.
Another different die:
Doubling on AMERICA: A lot of times on the same coin, the doubling maybe strong in one area and get weaker in different areas.
Note this is the same coin as above, but note the hub doubling is weaker on the lower devices on the coin.
On some coins you can find hub doubling on the MONTICELLO:
On some coins you will find hub doubling on FIVE CENTS:
Each maybe in varying degrees of strength, but usually show in the same locations.
Sometimes you will find hub doubling on the building. Either on the sides or the base:
Even trails can be found on proof nickels:
Keep in mind locations for hub doubling. These areas will be target areas for spotting doubled dies. Regardless of the year, look in these areas. Hope this helps.
Nice stuff Coop. Why is it necessary to find a match? To prove it's a variety? It still is what it is, isn't it? The 1960 looks like Trails to me. You can have them in two directions on the same coin, the die scraped the hub twice. Also they can be confined to one area on the coin. I'm guessing but I think that's because of a slight tilt in the set-up.
The point of the thread was not to match, (which is necessary to identify a certain die) but to look for hub doubling in the various areas where it could happen. Many times were are looking to hard at area that are usually not affected. Knowing the areas to look at will help in the search for these doubled dies.
You are correct. I was busy at the time and wanted to do this then, but I had to wait. Next will be Cents but I don't know when yet. It might have to be in three segments. Wheat, Memorial and Shield cents. Each will show different types of doubling because of the design differences of the reverses.