first few had Roller Pick-ups, but the majority had the Plunger
model has the Mark 1 Chassis with plastic wheels and was fitted
with the XO1 motor which has a disc commutator. The chassis was
fitted with a laminated sheet steel weight.
Locomotives still suffered from lack of weight, hence on some
models, a Lead weight was glued into the body moulding in the
fire-box as seen above.
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