Hi Benm, Deejay, Bluegmhtmonaro and ODK members,

Yes, who was D & W Engineering?
I had a hunch when I saw the picture that Scott Bonnar were involved with
distribution in the 1970s. I contacted the Scott Bonnar Historian, Grant Simpson,
and he has kindly supplied me with a scan of the brochure he had.

I believe your machine is a MK 1 dating from the mid 1960s.
Note how the SB Tow Tractor was distributed by SB Sales. This was when they
were part of the Electrolux group in the 1970s.

So we still do not know the full story. That they went through 2 models and
were later distributed by the market leader must suggest they were somewhat
successful as a design, perhaps not in sales. They are rare today.

Here is the front page of that record:
[Linked Image]