For the 1844 half penny there are two die varieties.  There are two obverse dies, both with striations, paired with a single reverse die.

Half Penny

The spacing is measured between the eight and the four.

Obverse Dies:  The Date

Narrow date

Wide date

Obverse Dies:  VICTORIA

VIC in alignment

VIC out of alignment.

Reverse Dies:  1/26

The fraction

Obverse Dies:  REGINA

Repunched I in REGINA.

Repunched G in REGINA.