That was a large run of boats built to a design for Alden. This ad of it's debut in GB in 1960 gives an idea of how fibreglas was still in it's infancy in the US and not at all accepted yet, on this side of the Atlantic. This despite the fact the hulls were all formed in the GB.
During it's introduction it was pretty innovative, and fast in it's day(and it was considered a yacht in those days!). We've sailed it for about a dozen years now in season on the coast of NE. It's proven about perfect for our family of four with it's conventional(at the time) layout. The twin pilot berths gave our kids their own cabins for those 12 years.
It has storage galore and good seaberths the rare time we need them. It also has a bronze centerboard(curiously not evident in this article) which I use to great advantage, I'm a serious gunkholer.
They're a tricky boat if the owner maintains them(which I do). You have to wear several hats and they require a few skills and quite a bit of research to know how to care for them. They have their quirks,....
One of the best qualities of this boat is, although it's no longer fast, it's a good sailer with plenty of SA/D, even better than some "recent" coastal cruisers. It has good light air performance. Thanks for asking Tas.