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.


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