July 1956 - 1960
From the initial launch group in 1956.
Available in bright or dark green and cream. All models have smooth fixed wheels.
October 1960 - 1963
Issued in 1960 to replace the rather dated TR2.
Available only in metallic olive green.
Late editions can have shaped fixed wheels.
November 1961 - 1965
Available in gold and white or blue and white.
This has free-spinning wheels and most gold editions were early editions with smooth wheels.
Later gold models and all blue models appear to have shaped wheels.
There are two types of base with different hinges for the bonnet.