Hello LawnRover

A warm welcome to these ODK forums.

It is frustrating researching Rover for many reasons;the main one
being little information has come forth from the 1970s.

The Colt was introduced in the early 1970s, possible along side the
Rover Rancher. Originally the Colt was offered with the 4hp 10 Series
Briggs (Colt Minor) and the 5hp 13 Series (Colt Major).

It was an immediate success and brilliant, simple design. Original
price was about $575 1970 dollars for the 4hp. By the end of the decade
that price would be about $775.

I do not have any of the early ads or brochures from the early 1970s.
The earliest brochure I have - covering the colt - is from the early 1980s.

https://www.outdoorking-forum.com.au/forum/ubbthreads.php/topics/67345/ROVER_-_Brochure_-_1980.html

Hope this helps.
----------------------
Jack