I totally misunderstood the OK dinghy there, as in okay. From a little googling, my dinghy is definitely not the OK design, you are right. I don't believe it is for any class design. Judging by the boomless, loose foot main, it wasn't intended for racing at all. Can't really do a good beam reach although it points relatively well. Downwind problematic too since main will rub on the aft angled shrouds. Seems like it was intended as a multi-purpose, rowing/sailing thing. I may be able fit a small outboard too but the stern has some overhang and hence not much buoyancy.
1978 Gulfstar 50'
Clark Sailing Dinghy 10'