EXTREMELY RARE 1 RUPEES 2008 STRUCK ON COIN FEEDER FINGER WITH CLEAR STRIKE, PLEASE SEE THE DESCRIPTIONS

A feeder finger error occurs when a coin die strikes the feeder finger mechanism (used to position coin blanks) instead of the blank itself during the minting process. This can result in a distinct “struck through” area on the coin, often with a deep impression and sharp angles.
 

What is a feeder finger? 

In coin production, a feeder finger is a component of the coining press that pushes coin blanks into the striking area where the dies strike the blank. 
 

How does the error occur?

Sometimes, the feeder finger can be struck by the die instead of the blank, resulting in a mark on the coin.
 

What does it look like?

The resulting error often appears as a deep, raised impression with sharp edges on the coin’s surface. The margins of the impression can be concave, straight, or angular according to Error-Ref.com.