Striations are the lines on the obverse die resulting when a reverse
die strikes the obverse die without a planchet between them.
This phenomenon can be seen on most 19th century Jersey coins.
On some coins, not only are the lines of the shield are visible,
but also the outline of the shield itself!
The following is a list of the coins which are known to have striations.
Striations on an 1841 1/52nd of a Shilling