I never said otherwise.
The first Combats being Roadsters is still doubtful in my opinion unless you have some proof.
"The 750cc Norton Commando which is now entering its fifth year of production, takes on a fresh guise for 1972 with the launching of the
new Interstate, Norton's most powerful road bike."
"When the Commando Roadster is fitted with the Combat engine and front disc brake as optional extras, it's hardly distinguishable from the Interstate model. ...etc."