G'day Gadge and Paul,
I can't say I understand the gold engine on this Rapid.
Every other rapid I have seen has a 9 series with Easy-Spin rewind.
No Rover I have recorded has had the gold colour.
No Rapid I have recorded had vert. pull start.
However, the Model 11109 does indicate a 9 Series 148cc 3.5 hp.
The Rapids I have seen have been 11107 - with the 9 Series 148cc 3hp.
So, from my perspective, it could be original.
The problem is the engine colour.
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Jack