According to Ted Brewer in this article in Good Old Boat. http://www.goodoldboat.com/reader_services/articles/ratingrules.php

Boats like SAPHAEDRA, used the yawl rig, keel centerboard to rating advantage. The CCA rule allowed heavier, seaworthy boats to be built that could compete in distance racing.

These were comfortable wide decked boats with plush(by future racing boat standards) accommodations, full galleys, dressers and bookshelves, fireplaces, you name it. Like Carlteon Mitchells FINESTERRE that won the Marion Bermuda race 3 times in a row, these boats were the racing culture at the time which revolved around long distance ocean racing, in some comfort.

It was a long run, the CCA era, that was about to end in 1965-70.

Cockpit details are like a time capsule. A boat usually undergoes some changes in 50 years. SAPHAEDRA has a new boom. Shorter? Maybe. The mainsheet arrangement may be 'new'. I'd find it annoying, especially if it was originally located forward of the mizzen mast.

One of my favorite K. Aage Nielsen design details is how deeply he formed the turn of the cabin top radius, and dropped the visual line so well with the eyebrow trim. He had an eye. Does anyone know what those two bronze enclosures abaft the mizzen mast, are?