Could be that someone, at some point, decided to put, say, a J24 keel on something like a Luger (the hull/cabin alone could be Luger).
If so, even more reason to be skeptical.. that kind of thing requires good engineering and reinforcement over the original configuration.
1984 Fast/Nicholson 345 "FastForward"
".. there is much you could do at sea with common sense.. and very little you could do without it.."
Capt G E Ericson (from "The Cruel Sea" by Nicholas Monsarrat)