Second (or for the afficionados Third) series Ta class, body reduced from a Northern Models kit with styrene and wire detailing, on an Atlas GP-9 chassis.
Third (or for the afficionados Fourth) series Ta class, body reduced from a Northern Models kit with styrene and wire detailing, on an Atlas GP 25 chassis.
Generally based on Victorian Railway's D3 Class, D3a has different wheel arrangement and has a body scratchbuilt in styrene and wire, on a Micro-Ace 2-6-0 chassis.