Both
The first run of 23s had a funny looking keel that was both a wing and a swing. You may want to stay away from a swing it was'nt a very good design. They only made about 20 boats with this keel, and was areal problem. They than made all of the boats with the wing keel. But with 2 different sets of spreaders. 27" and 36" it does make a difference on performance.