Hi Jack, thanks for the reply and the link to that manual, I had not come across that one yet and it has sooo much info which is exactly what I need. I love researching and learning as I go.
And yes I think it was a good buy, it was at an auction over 2 days they had a tonne of old mowers not far from where I live. There was another restored SB (think it was a 14 solid) that I had my eye on but it was a day 2 item and this one I was initially looking at was day 1. The pre-bidding bidding went over my budget ($500) for the day 2 item so I decided to stick with this one and I'm glad I did. As I said I wasn't sure at first on what I bought and the condition of it as I bid over the internet, pretty stoked to find its in good nick and hasn't done a lot of work.
I don't have a decent pic of the plate yet but I think it says model 33 then 07211.
Thanks again