From their announcement:
We have now released the Prussian Steam Tanks for our 18mm Martian Empires Victorian Science Fiction range.
These are :
EMPV11 Heavy Prussian Tank £6.00
EMPV12 Light Prussian Tank £6.00
They are both resin and metal kits. The Heavy tank comes with the option of 2 long guns and 2 short guns enabling to choose how to arm it.