What To Look For On The Jefferson Nickels Series For Hub Doubling.

Great information Coop. Thank you for all the effort.

Great info @COOP ! Thank you!

1963D Nickel w 5% clipped planchet. Does the clip occur before the devices or after? Would a clip create a doubling effect? Or could a clip happen on a doubled die? I think I see a split serrif on the right bottom leg of the R. I'm not sure if its Machine Doubling on the M in America? Any thoughts would be appreciated.

Clips happen before the strike. They are an issue with metal feed into the machine. If something is not started correctly, they it is started again.

Normal coin web:

Some of the straight clips are from the metal not being feed horizontally with the feed and the metal is not over the cutters:

These are punched out to form blanks:

The blanks for feed into the upset process to add the proto rim:



This turns them into planchets:

After the upset process, and they are now planchets, they are plated.

But if a blank/planchet is missing an area, the setup will show that the rim was not setup correctly. When the coin is struck the area 180 degrees from the clipped area will show weakness because of the missing metal on the blank, doesn't raise that area. So on a incomplete planchet, the area to look for will who 180 degree opposite the curved/straight clip/clips. This is called the Blakesley affect. (Noticed by a weakness of the rim:



Note how the affected area widens because of the setup area is not strong enought:



Triple Clipped coin:

Note the Blakesley areas?

When there is a hug clipped area, then the Blakesley affect will be less noticeable:



Note the center edge is distorted from the strike?



Note how the arc of the clipped area is slightly distorted?



Out of collar clip:



Fake Zincoln clip. How to tell?

Looks for the unplated edge of the clip. Someone cut the coin.
Hope this helps a bit?

Thank you both!! Such great information from you guys! I know I ask a ton of questions but I really want to understand. From the bit I have learned, if you see a split seriff you most likely have a doubled die? Is this correct? Maybe it only applies to RPMs? I don't know.
If this R isn't a split seriff, what is it?

Great post coop thanks. I appreciate all the responses

Coop,

I read your post with interest and pulled out my coins to check them against your photos. One of them seems to match a minor double die you have depicted; my 1962 Philadelphia proof nickel. I attached a picture to ask if you see it too. This is the best I could do through the mint set wrapper that still protects the '62 proof set. If you have time to look, what do you think? Does it look like it to you as well? Thanks in advance. Also thank you for the terrific information!

C.S.