sydchris said..
Interesting, "When she under full sail can do a comfortable 10 to 12knts"
https://www.gumtree.com.au/s-ad/potts-point/sail-boats/1980-swanson-28ft-yacht-for-sale/1232152236
I looked at this boat a couple of years ago. The rigging had been renewed recently, but the engine needed work, and the owner installed a "rebuilt" unit from the local Bukh dealer. Need I say more.
A saloon table with sharp, square corners, told me something about the qualifications of whoever did the fit-out.