Hi Woodsy, here is a little more info for you....
The Victa two-stroke petrol lawn mower is a light weight mower with sufficient power in its rotary-action blades to deal with long thick grass. The mower was developed in 1952 by Mervyn Victor Richardson and was an immediate success. Richardson set up a family company in 1953, sold 100 mowers in the first year and 60,000 in the fourth. Within a few years Richardson was a millionaire. The original designs were never patented - British patent 385473 of 29 February 1932 is earlier so the idea was not new. However, various improvements have been patented and all products have trade mark protection.

Reference: Australian Government Patent Information.
