How to differ DD coins from doubling???

Coqui

If anyone could tell me how I know is a coin is doubled die or doubling. Please help me , is something I dont know how to figure out.. Thanks for any help

LanLord

I assume by doubling you actually mean "machine doubling".

With a double die, the die was actually struck multiple times by the hub (a negative image of the coin) in slightly different places (perhaps rotated a degree or two) thus the design shows up twice completely formed.

In machine doubling the coin was struck, but the die bounced as it struck up the image. In this instance you have one fully formed image and a flattened image next to it. Kind of like a shoulder.

This is a rather simple explanation, there are some here that can go into much more detail, but this is a start.

coppercoins

Try this thread.

Coqui

Hey thanks.. now I have cleared my doubts... al my Jeffersons are machine doubling... but, do they commend a special error price or something?.. I know the price is lower than the DD, but could you give an Iidea for example, of a 1999P MS63 Jefferson duobling?

coppercoins

Machine doubling is typically not characterized as being worth any premium at all. I would doubt it be easy for you to get anything more than normal coin value for them.

keoj

Generally machine doubling commands no premium. They are simply variations in striking process.

keoj

Cam40

9 out of 10 people around here will tell you its nothing but it is something.Not all coins are minted this way.
Granted many are and enough are as to give them `common` status.But like Keojo stated they are a variation of
strikeing characteristics....A variety if you will.....Hmmmm Some people collect varieties huh....Hmmmmmm.

anoldgoat

Very good explaination with pics in that other thread. Thanks coppercoins.