Here is a picture of the rim of my nickel and I see other coins like this from time to time I am just wondering what type of error it is. I believe it's a striking error right?
I'm pretty sure I can answer this one correctly, as I've had the same question before. It's caused by a hard strike, pushing what appears to be a second rim. I believe it's another form of strike doubling, which has 10 other names that others go by. Should be worth face value if I'm correct. Good eye though!:thumb:
There are two things that can cause something like this and I can't tell from the picture which one this is. If the rim is showing two distinct levels with the outer one being taller then you have a finned rim. This is caused by the die being misaligned away from that point on the rim. The misalignment creates a wider gap between the neck of the die and the collar and metal squeezes up into the gap forming the "fin" on the outer edge of the coin. If it is basically a line on the top surface of the rim and the rim is about the same height on both sides of the line (it might be very slightly higher on the outer side.) then you have a collar clash. This is caused by the die being misaligned toward that area far enough that the part of the die that forms the top surface of the rim hit or clashed with the edge of the opening in the collar. This left a clashmark on the die. Then the die was realigned properly and the clashmark shows as a line dividing the rim into two portions.