Generally I look over all my coins but recently I've been really eyeing them like a collector. I here of so many types of coins that at first I ignored them and just collected by year. Now though I'm checking for any little variance.
Towards the end of December I found this dime in my piggy-bank(not actually in the shape of a pig).


This is an authentic error.
It is called a die crack because the die used to press the coin cracked and transfered the results on this and probably thousands of others before a mint inspector noticed.
The error coin book classifies this as II-D-1 Die Crack (W), the W stand for "wear" meaning that is how the mistake was formed. This classification is for three or less cracks that don't span the coin.
This particular error is not rare so the value is only twice the face value with only these minor cracks.
Here's the stats...
Type: 10 Cents / II-D-1 Die Crack /2 "light" cracks(1 from rim to center)
Year: 1983-P
Mintage: 647,025,000
Metal: 75% copper 25% nickel(Outer Layers), 100% copper(Inner Core)
Value: EF-40 $0.50
Because the coin is in quite a nice state it may be worth $0.25 and double it for the die crack for a grand total of $0.50. Not much but the first error of this type I recognized and kept.
Do you have an odd coin and want to know its value? Leave a comment/question and I will do my best to find out the price and history for you.