|image 1: obverse and reverse of the coin|
|image 2: crack line on the obverse|
|image 3: crack line on the reverse|
Wait! From the scanned image of the coin, I notice there is a crack line on the reverse too! See image 3.
After being pointed up by Mr Dickson, I now realized that the crack is in radial form. Most die cracks that I have encountered before is either radially inward or outward.