Here is a site with more info on the history of the Swift 40
Please add this to the info I previousley provided.
Would like to know how many hulls were built, both Swift 40's and Swallow 40's.
I will add it. Figuring out the total number probably won't be easy unless you can contact someone that was involved in building them. Then there are also the Hughes/Northstar versions too, built in Canada.