All Cromwell farthings are widely acknowledged as being
patterns and are extremely rare.

There were a few different types struck using a couple
different metals.

These types include:

Pattern Farthing, Obverse ship, reverse three “Pillars of
Wisdom”

Pattern Farthing, Obverse bust of Cromwell, reverse shield
of the protectorate.

Pattern Farthing, Obverse bust of Cromwell, reverse three
“Pillars of Wisdom

Pattern Farthing, Obverse ship, reverse bust of Cromwell