1950's Roosevelt Dime ....errors? ....doubling?

Ok - I really think it's gunna work this time!

The lines on the fields are called die flow. The hint of an enlarged area towards the rim are called die wear. The push upwards on the '59' is Machine Doubling. Not a doubled die. Just an extremely worn die, that after the coin was struck, altered the devices with Machine Doubling.
Variety Vista lists where examples for 1959 and they are all proof dimes.
http://www.varietyvista.com/07%20Ro...s%201959.htm
Note the first two examples are showing flat field doubling, but when you look at the other images you will see a spread that is the doubled die on the centers of the devices:
DDO-001:
http://www.varietyvista.com/07%20Ro...9PDDO001.htm
Note on Liberty that is flat field doubling. But note on the description what is actually doubled on this coin: (Always read this information)
DDO-002
This one also shows a lot of flat field doubling. Again note the description:
http://www.varietyvista.com/07%20Ro...9PDDO002.htm


So what does that mean? Only the date area shows the doubled die. The other images could be used for die markers if there was something there as a marker. Just only the date area is affected. The rest of the devices with the shadow are flat field doubling.
DDO-003
Some 'flat field doubling' on this coin also, but a lot more affected by the DDO:
http://www.varietyvista.com/07%20Ro...9PDDO003.htm
Note the areas to look at on this one:


So look at the areas suggested in the description as the doubled die. The rest of the devices are normal. Just the ones mentioned in the Description box are the doubled areas. So matching to the ones that are on your coin to the normal ones is just a waste of time. The doubling is only on certain devices. The rest of the devices are un-affected devices that are normal devices.

@reb, first welcome to CCF. Second, I'm glad that you got your USB microscope working and were able to post this pic. I agree that so far it doesn't look like a mint error, but perhaps you can show us similar close-ups of other areas that seem odd to you.

Ok fingers crossed - here are some of the other snaps I grabbed when I was going through the lot of coins and noted "possible errors" - these were all on 1956, 1957, or 1959 dimes.

The dies that struck your coin was showing strong die wear. Thus the devices facing the rim were move towards that area. The first clue is the die flow lines on the fields. So the devices were wearing towards that direction. But another factor is Machine Doubling that was also throwing a wrench into the strike. So die wear and Machine Doubling is causing the issue that you are seeing on those devices. Not a doubled die. A doubled die show spread on the centers of the devices, not on the outside edge of the devices. (Only ones that who doubled dies there is class 2 doubled dies, but they also show the spread enlargement of the devices) Also note that both sides of the coin is showing the same events. Die wear and Machine Doubling. Just a case of dies that should have been retired and the machine that was very loose. All the die flow lines and wear towards the rim, was a die issue, the Machine Doubling was a striking issue.

Note how the devices enlarge when hub doubling is present. This is a SBS collection of 1964 DDR's with a normal sized device in the center.

They are spenders. Interesting looking, something not to buy online as there are a lot of bottom feeders selling them for big money, but when they go to sell the coin, they are told it is a face value coin.