For the 1888 penny there are seven die varieties consisting of four obverse dies paired with five reverse dies.  Variety 1-C is the most common.

Ward 32
The Jersey Cow at Home
From "Ward & Lock's Illustrated Guide to, and Popular History of the Channel Islands", 1882


1888
Penny
Obverse
Reverse





The spacings are measured between the digits and between the center of the last eight and the N.


Obverse Dies:
The Star


Broken Ray




Complete Ray




Reworked Ray




Reverse Dies:  The Date

Uneven 88

88 Near N

The Straight 88

Large Spacing Vetween the 8s

Low 88