For the 1947 penny there are three die varieties consisting of a single obverse die paired with three reverse dies.  The difference is in the spacing of the date.
Caesarea 1794 3
Elizabeth Castle
From "Caesarea: or an Account of Jersey, the Greatest of the Islands round the Coast of England or the Ancient Duchy of Normandy"
began by Philip Falle, continued by Philip Morant, 1797


1947
Penny
Obverse
Reverse

The spacing is measured between the four and the seven.


Reverse Dies:
The Date

Large Spacing

Small Spacing

High 7